Hattie to Edward Wanton Casey, October 24, 1866

Height of bottom line above S.W. Corner, undated

Height of [Strasbourg] Cathedral Spire, undated

Heights of important buildings from Die Gartenlaube, Leipzig: E. Keil, 1882; undated [April 1893]

Heights of Spires of Cologne Cathedral, undated

Helen S. Lossing to Thomas Lincoln Casey, June 9, 1893

Helen M. Robert to Thomas Lincoln Casey, March 31, 1888

Henry A. Wind to Thomas Lincoln Casey, Janaury 20, 1886

Henry Brigham to Thomas Lincoln Casey, October 8, 1894

Henry C. Hodge to Thomas Lincoln Casey, January 30, 1882

Henry C. Hodges to Thomas Lincoln Casey, February 10, 1881

Henry C. Klotz to Thomas Lincoln Casey, June 12, 1893

Henry C. Murphy to Thomas Lincoln Casey, November 24, 1882

Henry C. Weir to Thomas Lincoln Casey, February 1, 1886

Henry E. Eland to Thomas Lincoln Casey, April 2, 1886

Henry E. Eland to Thomas Lincoln Casey, undated [May 1886]

Henry E. Meyer to Thomas Lincoln Casey, February 11, 1888

Henry E. Turner to Thomas Lincoln Casey, April 6, 1892

Henry E. Turner to Thomas Lincoln Casey, August 30, 1895

Henry E. Turner to Thomas Lincoln Casey, December 2, 1878

Henry E. Turner to Thomas Lincoln Casey, June 3, 1881

Henry E. Turner to Thomas Lincoln Casey, October 17, 1895

Henry E. Turner to Thomas Lincoln Casey, October 31, 1895

Henry E. Turner to Thomas Lincoln Casey, September 3, 1895

Henry F. Frank to Thomas Lincoln Casey, undated [August 1881]

Henry Hall to Thomas Lincoln Casey, February 10, 1893

Henry Hall to Thomas Lincoln Casey, February 5, 1889

Henry Hall to Thomas Lincoln Casey, February 8, 1893

Henry Hall to Thomas Lincoln Casey, January 28, 1889

Henry Hall to Thomas Lincoln Casey, June 26, 1888

Henry Hall to Thomas Lincoln Casey, March 18, 1889

Henry L. Abbot to Thomas Lincoln Casey, September 10, 1893

Henry L. Abbot to Thomas Lincoln Casey, September 15, 1893

Henry L. Abbot to Thomas Lincoln Casey, September 29, 1893

Henry L. Abbot to Thomas Lincoln Casey, September 29, 1894

Henry L. Abbot to Thomas Lincoln Casey, September 9, 1894

Henry L. Abbot to William P. Craighill, February 18, 1868

Henry L. Bryan to Thomas Lincoln Casey, March 22, 1888

Henry M. Mason to Thomas Lincoln Casey, February 13, 1893

Henry M. Mason to Thomas Lincoln Casey, February 20, 1893

Henry M. Robert to Thomas Lincoln Casey, July 1, 1893

Henry M. Robert to Thomas Lincoln Casey, March 23, 1888

Henry M. Robert to Thomas Lincoln Casey, May 24, 1893

Henry Melville to Thomas Lincoln Casey, April 25, 1893

Henry Melville to Thomas Lincoln Casey, June 12, 1893

Henry Melville to Thomas Lincoln Casey, June 13, 1893

Henry Melville to Thomas Lincoln Casey, May 4, 1893

Henry Romeike to Thomas Lincoln Casey, December 8, 1893

Henry Romeike to Thomas Lincoln Casey, February 12, 1889

Henry Turner to Thomas Lincoln Casey, April 6, 1894