Item 92993 - Blackman property, Both Sides Seashore Avenue, Peaks Island, Portland, 1924 Item 92993 - Blackman property, Both Sides Seashore Avenue, Peaks Island, Portland, 1924 Contributed by City of Portland - Planning & Development Item 92993 Zoom 4830px x 3932px - 16.1"w x 13.1"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Dwelling at Both Sides Seashore Avenue in Peaks Island, Portland, was owned by Charles C. Blackman in 1924. "Utowanna Farm". Show Details