MADDEN, CORNELIUS J.
VFM 2105:	Vertical File Manuscript Coll., Cornelius J. Madden, 93 items

MAGNUS, CHARLES (NEW YORK)
VFM 4115:	Vertical File Manuscript Coll., Charles Magnus(New York), 2 items

MAHON, WILL
VFM 922:	Vertical File Manuscript Coll.

MAHONING REGISTER (YOUNGSTOWN, OHIO)
OVS 2231:	Oversize Coll 2231, Mahoning Register (Youngstown) , 1 item

MANDERSON, CHARLES FREDERICK
VFM 1561:	Vertical File Manuscript Coll., Charles Frederick Manderson, 2 items

MANSFIELD, EDWARD D.
MSS 69:	Manuscript Coll. 69, Edward D. Mansfield, 1.25 cf

MARSHALL, JOHN WESLEY
MSS 679:	Manuscript Coll. 679, John Wesley Marshall, 1 item

MARSHALL, JOSEPH K.
VOL 1100:	Volume 1100, Joseph K. Marshall, 1 item

MASTICK-MERWIN-WOOD FAMILIES
MSS 876:	Manuscript Coll. 876, Wood-Mastick-Merwin Families, 2 cf

MATHEWS, ALFRED E., LITHOGRAPH COLL.
P 369:	Photo Coll. 369, Alfred E. Mathews Lithograph collection , 63 items

MATHEWSON, LEWIS
VFM 2070:	Vertical File Manuscript Coll., Lewis Mathewson, 17 items

MATHIAS, EDMUND H.
VFM 182:	Vertical File Manuscript Coll., Edmund H. Mathias, 2 items

MATTOON FAMILY
VFM 2905:	Vertical File Manuscript Coll., Matton Family, 74 items

MCCAUSLAND FAMILY
MSS 685:	Manuscript Coll. 685, McCausland Family, .25 cf

MCCLELLAN, ABRAM
MSS 26:	Manuscript Coll. 26, Abram McClellan, .25 cf

MCCLELLAN, GEORGE B.
SC 3535:	Small Photo Coll. 3535, George B. McCellan, 18 items

MCCLELLAND, SAMUEL
VFM 1619:	Vertical File Manuscript Coll., Samuel McClelland, 23 items

MCCLURG, GEORGE
AP 10:	Antique Photo 10, George McClurg
AP 113:	Antique Photo 113, George McClurg

MCCOOK FAMILY
P 27:	Photo Coll. 27, McCook Family, .5 cf
SC 3348:	Small Photo Coll. 3348, McCook Family, 5 items
SC 3349:	Small Photo Coll. 3349, McCook Family, 24 items
SC 3545:	Small Photo Coll. 3545, McCook Family, 17 items
SC 4461:	Small Photo Coll. 4461, The Fighting McCooks, 20 items

MCDOWELL, IRVIN
SC 3390:	Small Photo Coll. 3390, Gen. Irvin McDowell, 1 item

MCEBRIGHT, THOMAS
VFM 2103:	Vertical File Manuscript Coll., Thomas McEbright, 8 items

MCKEE, BYRON
VFM 3378:	Vertical File Manuscript Coll., Byron McKee, 1 item

MCKEE, EDWARD REISTER
MSS 238:	Manuscript Coll. 238, Edward Reister McKee, .5 cf

MCKINLEY, WILLIAM
CA 7:	Cartoon 7, William McKinley (25 cartoons)
PR 17:	Print Coll. 17, William McKinley, 9 items
SC 1388:	Small Photo Coll. 1388, William McKinley, 21 items
SC 1407:	Small Photo Coll. 1407, McKinley Memorial and Monument, 21 items
SC 4699:	Small Photo Coll. 4699, William McKinley Funeral , 18 items
SC 4835:	Small Photo Coll. 4835, McKinley Home , 9 items
SC 5365:	Small Photo Coll. 5365, William McKinley, 9 items
VOL 394:	Volume 394, William McKinley, 1 item

MCKINLEY, WILLIAM - FUNERAL
SC 4699:	Small Photo Coll. 4699, William McKinley Funeral , 18 items

MCKINLEY, WILLIAM - HOME
SC 4835:	Small Photo Coll. 4835, McKinley Home , 9 items

MCKINLEY, WILLIAM - MEMORIAL AND MONUMENT
SC 1407:	Small Photo Coll. 1407, McKinley Memorial and Monument, 21 items

MCLEAN HOUSE, APPOMATTOX COURT HOUSE, VIRGINIA
SC 4505:	Small Photo Coll. 4505, Wilmer McLean House, 1 item

MCLEAN, J. P.
OVS 935:	Oversize Coll. 935, J.P. McLean, 1 item

MCLEAN, WILLIAM E.
VFM 928:	Vertical File Manuscript Coll., William E. McLean, 1 item

MCMILLEN, WILLIAM L.
VFM 73:	Vertical File Manuscript Coll.

MCNUTT, LOU S. S.
VFM 749:	Vertical File Manuscript Coll., Lou S. S. McNutt, 1 item

MCPHERSON, JAMES BIRDSEYE
SC 3577:	Small Photo Coll. 3577, James B. McPherson, 7 items
VFM 1444:	Vertical File Manuscript Coll.

MCPIKE, SIMON
VFM 4097:	Vertical File Manuscript Coll., Simon McPike, 1 item

MCVEIGH, JESSE
VFM 1709:	Vertical File Manuscript Coll.

MCVEY, WILLIAM
MSS 638:	Manuscript Coll. 638, William McVey, .25 cf

MEADE, GEORGE GORDON
SC 2053:	Small Photo Coll. 2053, George Gordon Meade, 3 items

MEAGHER, THOMAS FRANCIS
SC 4520:	Small Photo Coll. 4520, Thomas Francis Meagher, 1 item

MEDARY, SAMUEL
MSS 134:	Manuscript Coll. 134, Samuel Medary, 78 items

MENDENHALL, THOMAS J.
VFM 1775:	Vertical File Manuscript Coll.

MERWIN-MASTICK-WOOD FAMILIES
MSS 876:	Manuscript Coll. 876, Wood-Mastick-Merwin Families, 2 cf

METCALF, GEORGE PERRY
VOL 1078:	Volume 1078, George Perry Metcalf, 1 item

METROPOLITAN FAIR, NEW YORK CITY
VFM 857:	Vertical File Manuscript Coll., Metropolitan Fair, New York City, 1 item

METZ, A.
VFM 83:	Vertical File Manuscript Coll.

METZGER, JOHN J.
VFM 644:	Vertical File Manuscript Coll., John J. Metzger, 1 item
VFM 845:	Vertical File Manuscript Coll., John J. Metzger, 1 item

MIDDLESWART, RUSSELL C.
VFM 1607:	Vertical File Manuscript Coll., Russell C. Middleswart, 9 items

MIGHT OF THE REPUBLIC (COMPOSITE PHOTOGRAPH OF LLL CARTE DE VISITES)
OVS 756:	Oversize Coll. 756, Might of the Republic (composite photograph of 111 carte de visites of Civil War soldiers and politicians, primarily from Ohio), 1 item

MILITARY COMMITTEE OF FAIRFIELD COUNTY, OHIO
VFM 4415:	Vertical File Manuscript Coll.

MILITARY COMMITTEES OF GALLIA AND CLERMONT COUNTIES, OHIO
VFM 1210:	Vertical File Manuscript Coll.

MILITARY HOSPITAL, UNIDENTIFIED - ARCHITECTURAL DRAWING
OVS 1785:	Oversize Coll 1785, Unknown military hospital, 1 item

MILITARY MUSIC IN AMERICA
AUDVFM61:	Audio Vertical File 61, Military Music in America

MILITARY PRISON RECORD, CAMP CHASE AND JOHNSON'S ISLAND, 1861-1862
SERIES 1425:	Adjutant General. Military Prison Record, Camp Chase and Johnson’s Island, 1861-1862, 2 items

MILITIA OF THE RESERVE, 1861
SERIES 1421:	Adjutant General. Militia of the reserve, 1861, 2 items

MILLER, HILLBORN C.
OVS 1525:	Oversize Coll. 1525, Hillborn C, Miller, 2 items

MILLER, ROBERT G.
VFM 2281:	Vertical File Manuscript Coll.

MILLER, THADDEUS KANE
VFM 2657:	Vertical File Manuscript Coll., Thaddeus Kane Miller, 31 items

MILLER, WILLIAM H.
VFM 2281:	Vertical File Manuscript Coll.

MILLS, GEORGE B.
VFM 861:	Vertical File Manuscript Coll., George B. Mills, 4 items

MILLVILLE, OHIO, ANDERSON GUARDS
VFM 1402:	Vertical File Manuscript Coll.

MINER, SAMUEL S.
MSS 466:	Manuscript Coll. 466, Samuel S. Miner, .25 cf

MINSHALL, WYATT
VFM 992:	Vertical File Manuscript Coll., Wyatt Minshall, 3 items

MISSIONARY RIDGE AND LOOKOUT MOUNTAIN MONUMENT COMMISSION
SERIES 2655:	Special Boards and Commissions, Missionary Ridge and Lookout Mountain Monument Commission, Correspondence, 1902-1904, 1 item

MITCHELL, E. R.
VFM 2346:	Vertical File Manuscript Coll.

MITCHELL, JAMES
VFM 1605:	Vertical File Manuscript Coll., James Mitchell, 2 items

MITCHELL, WILLIAM B.
VFM 3101:	Vertical File Manuscript Coll., William B. Mitchell, 13 items

MIX, OZIAS
VFM 3076:	Vertical File Manuscript Coll., Ozias Mix, 11 items

MOCK, MARTIN
VFM 1711:	Vertical File Manuscript Coll.
VFM 1777:	Vertical File Manuscript Coll., Martin Mock, 1 item

MONIES, CHECKS, AND CERTIFICATES RECEIVED AND FORWARDED BY THE ADJUTANT GENERAL, 1867-1874
SERIES 1412:	Adjutant General. Monies, checks, and certificates received and forwarded by the Adjutant General of Ohio, 1867-1874(volume), 1 item

MONTHLY ALLOTMENT REPORTS, WARRANTS, AND PAYROLLS, 1864-1865
SERIES 2234:	Adjutant General, Paymaster General, Monthly allotment reports, warrants, and payrolls, 1864-1865, .7 cf

MONTHLY AND TRI-MONTHLY REPORTS OF VOLUNTEERS MUSTERED INTO THE SERVICE
SERIES 2115:	Adjutant General, Monthly and tri-monthly reports of volunteers mustered into the service of the United States, 1861-1865, 2 cf

MONTHLY RETURNS, OHIO VOLUNTEERS, 1861-1865
SERIES 2109:	Adjutant General, Monthly returns, Ohio Volunteers, 1861-1865, 1 cf

MOON, LOTTIE
OVS 686:	Oversize Coll. 686, Lottie Moon, 1 item

MOORE, THOMAS W.
VOL 402:	Volume 402, Thomas W. Moore, 1 item

MOORE, WILLIAM R.
MSS 22:	Manuscript Coll. 22, William R. Moore, .25 cf

MOORE, WILSTACH & BALDWIN (OHIO)
OVS 1031:	Oversize Coll. 1031, Moore, Wilstach & Baldwin (Ohio), 1 item

MOREHOUSE, CHARLES LUDLOW
VFM 3019:	Vertical File Manuscript 3019, Charles Ludlow Morehouse
VOL 1036:	Volume 1036, Charles Ludlow Morehouse, 1 item
VOL 1037:	Volume 1037, Charles Ludlow Morehouse, 1 item
VOL 1038:	Volume 1038, Charles Ludlow Morehouse, 1 item

MORGAN, JOHN HUNT
SC 3642:	Small Photo Coll. 3642, John Hunt Morgan, 2 items
VFM 1773:	Vertical File Manuscript Coll.
VFM 2062:	Vertical File Manuscript Coll.

MORGAN'S RAID
SC 1173:	Small Photo Coll. 1173, Morgan’s Raid, 12 items
VFM 4082:	Vertical File Manuscript Coll.

MORGAN'S RAID CLAIMS
SERIES 49:	Adjutant General. Morgan’s Raid claims letter book, 1865-1868, 2 items
SERIES 99:	Adjutant General. Index and record of Morgan’s Raid claims, 1865-1866, 2 items
SERIES 172:	Adjutant General. Morgan’s Raid claims, 1863-1864, 2.5 cf
SERIES 2040:	Adjutant General, Record of Morgan’s Raid claims, 1864, 4 items

MORNING REPORT BOOK OF COMPANY F OF THE 126TH REGIMENT, OVI
SERIES 1741:	Adjutant General, Morning Report book of Company F of the 126th Regiment, Ohio Volunteer Infantry, 1862-1864, 1 item

MORNING REPORT BOOK, 152ND REGIMENT, OHIO NATIONAL GUARD, 1864
SERIES 2073:	Adjutant General, Surgeon General, Morning report book, 152nd Regiment, Ohio National Guard, 1864, 1 item

MORNING REPORT REMARKS, COMPANY M, 1ST REGIMENT, OVC
SERIES 2444:	Adjutant General, Morning reports remarks, Company M, 1st Regiment, Ohio Volunteer Cavalry, 1861-1864, 1 volume

MORNING REPORTS AND REMARKS OF COMPANY H, 148TH REGIMENT, OVI
SERIES 2102:	Adjutant General, Morning reports and remarks of Company H, 148th Regiment, Ohio Volunteer Infantry, 1864, 1 item

MORNING REPORTS OF DRAFTED MEN AND VOLUNTEERS, 1861-1863
SERIES 2107:	Adjutant General, Morning reports of drafted men and volunteers, 1861-1863, 2 cf

MORRIS, ISAAC S.
VFM 532:	Vertical File Manuscript Coll.

MORRIS, JOHN W.
OVS 1526:	Oversize Coll. 1526, John W. Morris, 1 item

MORRIS, SARAH HALL
VFM 2703:	Vertical File Manuscript Coll., Sarah Hall Morris, 21 items

MORRISON, B. M.
VFM 839:	Vertical File Manuscript Coll.

MOSBY, JOHN SINGLETON
SC 3591:	Small Photo Coll. 3591, Col. John S. Mosby, 1 item

MOUK, JOHN
VOL 508:	Volume 508, John Mouk, 1 item
VOL 509:	Volume 509, John Mouk, 1 item
VOL 510:	Volume 510, John Mouk, 1 item
VOL 511:	Volume 511, John Mouk, 1 item
VOL 512:	Volume 512, John Mouk, 1 item
VOL 513:	Volume 513, John Mouk, 1 item

MOUNT, CHARLES GREENS MCCHESNEY
MSS 369:	Manuscript Coll. 369, Charles Greens McChesney Mount, 300 items

MURPHEY, WILLIAM
VFM 827:	Vertical File Manuscript Coll., William Murphey, 2 items
VFM 834:	Vertical File Manuscript Coll., William Murphey, 1 item

MURRAY, LUKE
VFM 869:	Vertical File Manuscript Coll., Luke Murray, 2 items

MUSTER ROLLS OF COMPANIES E AND H, 100TH REGIMENT, OVI
SERIES 2817:	Adjutant General, Muster rolls of Companies E and H, 100th Regiment, OVI, 1861-1866, and Company K, 3rd Regiment, OVI, 1861, 1 folder

MUSTER ROLLS OF COMPANY K, 3RD REGIMENT, OVI
SERIES 2817:	Adjutant General, Muster rolls of Companies E and H, 100th Regiment, OVI, 1861-1866, and Company K, 3rd Regiment, OVI, 1861, 1 folder

MUSTER ROLLS OF THE 89TH, 94TH, 121ST, AND 128TH REGIMENTS, OVI
SERIES 2442:	Adjutant General, Muster rolls and miscellaneous documents of the 89th, 94th, 121st, and 128th regiments, OVI, 1861-1865, 1 cf

MUSTER-IN AND MUSTER-OUT ROLLS, 1861-1865
SERIES 2440:	Adjutant General, Muster-in and muster-out rolls, 1861-1865, (microfilm), 385 items

MUSTER-IN ROLL BOOKS, OHIO VOLUNTEERS, 1861-1865
SERIES 66:	Adjutant General. Muster-in roll books, Ohio volunteers, 1861-1865, 179 items

MUSTER-IN ROLL OF SURGEONS AND NURSES, CA. 1861-1862
SERIES 2330:	Adjutant General, Surgeon General, Muster-in roll of surgeons and nurses, ca. 1861-1862, 1 item

MUSTER-IN ROLL, 5TH REGIMENT, U.S. COLORED TROOPS, 1863
SERIES 2141:	Adjutant General, Muster-in roll 5th Regiment, U.S. Colored Troops, 1863, 1 roll microfilm

MUSTER-IN ROLLS
SERIES 2160:	Adjutant General, Ohio Volunteer Infantry company re-enlistment muster-in rolls, 1864, 7.3 cf

MYER, ALBERT JAMES
VFM 2344:	Vertical File Manuscript Coll.