Update: February 10, 2017
This postcard of mis-identification was presented to me about a year ago as a gift by JMV of Illustrated Vancouver. The image appears to have been made between 1911 (when construction of FBC at Nelson & Burrard was completed) and 1921 (when right-side-of-the-road driving was established in the province, as the vehicle passing the Nelson Street doors appears to be on the left side of the road). I have no idea how many of these mis-identified cards were printed, but I’ve never seen another.
For another case of mis-identification (as of February 2017), see the City of Vancouver Archives photo below. Once again, the two churches involved are First Baptist and Christ Church. This time, however, the shoe is on the other foot. The interior of what is plainly (to me) Christ Church Cathedral is mis-identified as First Baptist Church!
The sanctuaries of the two places of worship have little in common except their proximity to one another (FBC is at Burrard and Nelson; Christ Church at Burrard and Georgia). For comparison purposes, a photo of First Baptist’s sanctuary, ca1931 (post-fire reconstruction), may be viewed here (the second photo in the post).