Item 85449 - Foster property, Summit Avenue, Great Diamond Island, Portland, 1924 Item 85449 - Foster property, Summit Avenue, Great Diamond Island, Portland, 1924 Contributed by City of Portland - Planning & Development Item 85449 Zoom 4728px x 3462px - 15.8"w x 11.5"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Summer Dwelling at Summit Avenue in Great Diamond Island, Portland, was owned by Idolyn D. Foster in 1924. Idolyn Doten Foster Show Details