Great Western Railway station in Chatham, Ontario. The Grand Trunk Railway took over the GWR in 1883, therefore the photo is dated before that date. Other copies of the photo online source it to the Chatham-Kent Museum, circa 1887. see <a rel="nofollow" class="external text" href="https://dalspace.library.dal.ca/bitstream/handle/10222/71207/vol21_1_25_31.pdf;sequence=1">page 4 of this article</a>
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external free" href="http://www.chathamthisweek.com/2017/09/12/railroads-once-at-the-heart-of-prosperity">http://www.chathamthisweek.com/2017/09/12/railroads-once-at-the-heart-of-prosperity</a>