Olcott & Olcott to Thomas Lincoln Casey, March 8, 1892

On file in the War Department, undated

Orlando M. McPherson to Thomas Lincoln Casey, March 31, 1895

Orlando M. Poe to Thomas Lincoln Casey, June 26, 1892

Orville E. Babcock to Honorable Hannibal Hamlin, March 16, 1874

P. A. Breen to General [A. A.] Humphreys, October 13, 1870

P. T. Petz [poss.] to Thomas Lincoln Casey, June 15, 1855

P. T. Turnley to Thomas Lincoln Casey, February 7, 1888

Page & Bankes to Thomas Lincoln Casey, March 28, 1856

Paine to Thomas Lincoln Casey, June 11, 1863

Paine to Thomas Lincoln Casey, June 14, 1863

Parson to Thomas Lincoln Casey, January 3, 1889, telegram

Patrick Henry to Thomas Lincoln Casey, May 16, 1893

Patrick O'Neal to Thomas Lincoln Casey, January 31, 1881

Paul Dahlgren to Thomas Lincoln Casey, March 25, 1873

Paymaster [Charles] Larned to Thomas Lincoln Casey, December 6, 1873

Peter C. Hains to Thomas Lincoln Casey, April 10, 1892

Peter C. Hains to Thomas Lincoln Casey, April 3, 1888

Peter C. Hains to Thomas Lincoln Casey, December 1, 1868

Peter C. Hains to Thomas Lincoln Casey, December 26, 1882

Peter C. Hains to Thomas Lincoln Casey, January 19, 1895

Peter C. Hains to Thomas Lincoln Casey, March 27, 1888

Peter C. Hains to Thomas Lincoln Casey, November 11, 1868

Peter C. Hains to Thomas Lincoln Casey, November 23, 1868

Peter Hains to Thomas Lincoln Casey, November 29, 1894

Peter Harris to Thomas Lincoln Casey, October 13, 1894

Pettit & Dripps to Thomas Lincoln Casey, July 7, 1881

Phil Cook to Thomas Lincoln Casey, undated [1880]

Philetus Sawyer to Thomas Lincoln Casey, May 13, 1892

Philip M. Price to Thomas Lincoln Casey, March 25, 1889

Philip Price to Thomas Lincoln Casey, March 18, 1889

Plants delivered [to Senators], undated [1878]

Power of Attorney: General Silas Casey to Thomas Lincoln Casey, July 23, 1855

Prentiss to Thomas Lincoln Casey, January 25, 1888

President's Gallery, Admit Bearer, March 4, 1881

Previous at different levels of the Foundation, undated

Professor Blanchard to Thomas Lincoln Casey, January 1894, draft

Professor Dennis H. Mahan to Thomas Lincoln Casey to Thomas Lincoln Casey, March 31, 1871

Professor Dennis H. Mahan to Thomas Lincoln Casey, April 13, 1871

Professor Dennis H. Mahan to Thomas Lincoln Casey, April 6, 1871

Professor H. L. Kendrick to Thomas Lincoln Casey, June 21, 1872

Professor J. B. Wheeler to Thomas Lincoln Casey, June 14, 1872

Professor Robert W. Weir to Thomas Lincoln Casey, April 8, 1872

Professor S. E. Tillman to Thomas Lincoln Casey, May 10, 1889

Professor S. E. Tillman to Thomas Lincoln Casey, May 6, 1889

Professor [Dennis] H. Mahan to Thomas Lincoln Casey, March 15, 1871

Professor [George] F. Andrews to Thomas Lincoln Casey, July 13, 1882

Project for Military Engineer Corps, May 15, 1862

Project of Expendition of 1st 150,000 and probable work calling can do, June 1880

Major [William R.] King to Thomas Lincoln Casey, March 9, 1873