Item 91587 - Mahoney property, Island Avenue, Long Island, Portland, 1924 Item 91587 - Mahoney property, Island Avenue, Long Island, Portland, 1924 Contributed by City of Portland - Planning & Development Item 91587 Zoom 4836px x 3564px - 16.1"w x 11.9"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Summer Dwelling at Island Avenue in Long Island, Portland, was owned by Patrick A. Mahoney in 1924. Show Details