The map shows West street Chapel as a large building, indeed it was so when my brother and I attended Sunday School there in the 1940s, but when I last visited Rochdale about 10 years ago I found that that building was a Chinese warehouse and the chapel was a small modern building next door. The same sort of thing had happened to Newbold Baptist Church, too.
My grandfather was organist and choirmaster at West Street in the early 1900s.