Letters of personal reference
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
label: See more items in
content: Henry Grattan Tyrrell and Mary Maude Knox Tyrrell Papers / Series 3: Business Records / 3.1: Engineering
unitdate: label: Date
content: 1902
label: Date
content: 1917
label: Date
content: 1919
label: Date
content: 1923
container: label: Container
content: Box 1, Folder 22
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials