Proposals, drawings, and sketches
name: label: Collection Creator
content: Tyrrell, Henry Grattan, 1867-1948
label: Collection Author
content: Tyrrell, Mary Maude Knox
setName: label: See more items in
content: Henry Grattan Tyrrell and Mary Maude Knox Tyrrell Papers
unitdate: label: Date
content: 1920-1921
label: Date
content: circa 1900-1908
label: Date
content: undated
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.0948, Series 4
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents
content: This series contains contract proposals for several engineering projects, as well as images of Tyrrell's bridge designs in the form of pencil sketches, photo reproductions, postcards, catalog illustrations, and drawings. Also included is a blueprint of his hand-traveling crane and a large colored drawing of an ideal design layout for the buildings of a mill factory.