Item 85731 - McDougall property, S. side Summit Avenue, Great Diamond Island, Portland, 1924 Item 85731 - McDougall property, S. side Summit Avenue, Great Diamond Island, Portland, 1924 Contributed by City of Portland - Planning & Development Item 85731 Zoom 4752px 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 Dwelling at S. side Summit Avenue in Great Diamond Island, Portland, was owned by John A. McDougall in 1924. Leon G. Bruton Show Details