Item 88629 - Trefethen property, Island Avenue, on shore, Peaks Island, Portland, 1924 Item 88629 - Trefethen property, Island Avenue, on shore, Peaks Island, Portland, 1924 Contributed by City of Portland - Planning & Development Item 88629 Zoom 4752px x 3478px - 15.8"w x 11.6"h @ 300dpi | Need a larger size? *Credit line must read: Collections of City of Portland - Planning & Development Image Info Shed at Island Avenue, on shore in Peaks Island, Portland, was owned by William H. Trefethen in 1924. Albert E. Trefethen Show Details