I also have a set of Frank Lewis 'sketches of old Vancouver structures. They are beautifully done and have been in a folder all these years and have never been framed. Are they of value to a collector or to a museum for display?

These prints have appeared here before, I received a similar message a while back.

https://illustratedvancouver.ca/post/185098862395/hello-i-have-5-prints-by-frank-lewis-76-of-what

Illustrated Vancouver

As reproductions, their value is nominal, someone might like to frame them, best seen in vintage frames and hung in an old house. VanArchives may or may not have them, you would have to check with them to see if they would accept them into the archive.