Letter from Joseph Henry to John William Dawson, written from Washington.

Letter from Chas. D. Walcott to John William Dawson, written from Washington, D.C.

Letter from Chas. D. Walcott to John William Dawson, written from Washington, D.C..

Letter from Spencer F. Baird to John William Dawson, written from Washington, D.C.

Letter from Joseph Henry to John William Dawson, written from the Smithsonian Institution, Washington, D.C.

Letter from D. Leech to John William Dawson, written from Washington, D.C.

Letter from David White to John William Dawson, written from Washington, D.C..

Letter from J.W. Spencer to John William Dawson, written from Washington, D.C.

Letter from Bernard to Anna Harrington.