Mrs. J. S. Newbury to Thomas Lincoln Casey, February 13, 1880

Mrs. James A. Briggs to Thomas Lincoln Casey, April 1882

Mrs. John A. Logan to Thomas Lincoln Casey, February 26, 1881

Mrs. John A. Logan to Thomas Lincoln Casey, July 10, 1894

Mrs. Julia A. Roberts to Thomas Lincoln Casey, undated [February 1881]

Mrs. L. M. Taber to Thomas Lincoln Casey, August 20, 1894

Mrs. L. M. Taber to Thomas Lincoln Casey, September 6, 1894

Mrs. L. V. Brown to Thomas Lincoln Casey, January 5, 1886

Mrs. Lucie Jeffers to Thomas Lincoln Casey, April 14, 1888

Mrs. M. K. Campbell to Thomas Lincoln Casey, May 7, 1880

Mrs. Major J. B. Quinn to Thomas Lincoln Casey, April 20, 1894

Mrs. Martha R. Hutchison to Thomas Lincoln Casey, March 14, 1894

Mrs. Matilda Dallas Scott to Thomas Lincoln Casey, undated [February 1881]

Mrs. Matilda V. Casey to Thomas Lincoln Casey, May 10, 1881

Mrs. McClary to Thomas Lincoln Casey, December 13, 1878

Mrs. McClary to Thomas Lincoln Casey, undated [December 1878]

Mrs. Perry to Thomas Lincoln Casey, January 20, 1893

Mrs. S. H. Willey to Thomas Lincoln Casey, September 4, 1893

Mrs. Scott to Thomas Lincoln Casey, June 12, 1882, copy

Mrs. V. P. Harris to Thomas Lincoln Casey, May 26, 1892

Mrs. [Electa Allen Sanderson] Dawes to Thomas Lincoln Casey, February 7, 1881

Mrs. [Henry] L. Dawes to Thomas Lincoln Casey, July 1, 1878

Mrs. [William]. H. Hatch to Thomas Lincoln Casey, March 10, 1880

Mulletts Suit in Court of Claims, undated

Mutual Life Insurance Co. dividend statement, undated [January 1892]

Mutual Life Insurance Co. to Thomas Lincoln Casey, January 21, 1892, telegram

Note: Letters from Thomas Lincoln Casey to his Father

Note: Letters received from Thomas L. Casey while

Notes on interior shape from Swing of Monument, undated

Notes on Monument Crane, undated

Notes on Project for a Marble Pyramidion for the Washington Monument, April 4, 1884

Notes, sketch of cracks in foundation of the Washington Monument, undated

Notification of failure to pay a loan, April 1, 1895

NY Athletic Club to Thomas Lincoln Casey, January 16, 1888

NY Genealogical and Biographical Society to Thomas Lincoln Casey, May 25, 1889

O. Ferriss to Thomas Lincoln Casey, July 12, 1882

O. H. Ernst to Thomas Lincoln Casey, August 8, 1890, copy

O. H. Ernst to Thomas Lincoln Casey, February 11, 1891

O. H. Ernst to Thomas Lincoln Casey, June 29, 1892

O. L. Pruden to Thomas Lincoln Casey, June 10, 1892

O. L. Pruden to Thomas Lincoln Casey, May 8, 1895

O. L. Pruden to Thomas Lincoln Casey, November 2, 1895

O. M. Carter to Thomas Lincoln Casey, April 1, 1889

O. M. Carter to Thomas Lincoln Casey, June 2, 1889

O. M. Carter to Thomas Lincoln Casey, June 8, 1889

O. M. Carter to Thomas Lincoln Casey, June 9, 1889

Obelisk - calculations for weight, etc., undated

Office of Building for State War and Navy Departments - Washington Monument Payment Refunds, November 7, 1887

Office of the Light House Board to Thomas Lincoln Casey, February 28, 1888

Office of the Light-House Board to Thomas Lincoln Casey, April 13, 1888