Did Charles R Mackintosh design this poster: http://www.achome.co.uk/pictorial/mackintosh/cmack2.jpg?

Question

I know he mostly did architecture/furniture design, and his wife Margaret MacDonald did more card/book/poster designs. I have to do a presentation on whoever designed this particular image so any help is much appreciated! PS I realize the website says Mackintosh by it, but I just want to make sure, I couldn't find any other sources.

Answer 1

It's a "go!"
The Hunterian Museum and Art Gallery, University of Glasgow
http://www.huntsearch.gla.ac.uk/cgi-bin/foxweb/huntsearch/DetailedResults.fwx?collection=art&SearchTerm=41537&reqMethod=Link