Keywords: Plat of Portland OR c1850s.png Plat map of Portland Township No 1; From Oregon document miscellany 1843-1864 See also this slightly later/more complete plat map File Map of Portland Oregon land claims from Gaston book png Institution Rare Book and Manuscript Library Yale University New Haven circa 1850 s unattributed PD-old http //brbl-dl library yale edu/vufind/Record/3519161 Images from the Beinecke Rare Book and Manuscript Library Drawings in the Yale University Library History of Portland Oregon Maps of Portland Oregon Survey drawings |