Item 85529 - Whipple property, N. side Sunset Avenue, Great Diamond Island, Portland, 1924 Item 85529 - Whipple property, N. side Sunset Avenue, Great Diamond Island, Portland, 1924 Contributed by City of Portland - Planning & Development Item 85529 Zoom 4776px x 3502px - 15.9"w x 11.7"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Summer Dwelling at N. side Sunset Avenue in Great Diamond Island, Portland, was owned by Farrington H. Whipple in 1924. Show Details