yesterday evening we had the opportunity to review photos in the Town archives. the holdings include many views of the Circle but no. 15 appears in very few of them due to pointing angle (it was just outside the margin of several images) or obstruction by vegetation or, in the earliest views, the Tabernacle.
this image is from a postcard taken in the 1900s 1920s and is the only one prior to the 1950s in which the cottage can be seen.
this was before the dormers were added, the exterior covered with shingles and the
upstairs front window replaced.
the porch's tin roof remained through the 1950s
c. 1920s
back to the issue at hand: some trim is visible on the double doors in the middle of the front and under the flanking windows. but the details above the doors and windows cannot be made out.
it is also interesting to note that next door, the steps to Allan Janus' cottage then spanned the full width of the porch. this was also the case for no. 11, out of the image to the R.
many thanks to Missy Yachup for taking time away from her family to make the archives available for this search.