Contemporary photo by Derek Davis/Staff Photographer; 1950 Press Herald photograph courtesy of the Portland Public Library Special Collections & Archives

A Portland Evening Express photograph from December 1977 shows pedestrians walking up Exchange Street toward Middle Street after a snowstorm. The scene was much the same on January 18, 2016, when snow squalls blanketed the city with several inches of fresh snow.

The Portland Room of the Portland Public Library is in the process of organizing and conserving the archival collection of original Portland Press Herald, Maine Sunday Telegram and Evening Express photographic negatives — a major collection that spans from 1937 to 2005. Find more photos at www.pressherald.com/flashback/.