Great Britain Mulready-Like Envelopes

I know they are different from the original Mulready. But they look nice and old. Any information?

The second one, I know for sure, was part of the antislavery campaign. You will find all of them on http://www.gbps.org.uk where you can see the images once you register as a member. [Yes, old-fashioned, I know ]

Valentine had a workshop in Dundee, Scotland - I used to live there and I have seen plenty of his work. Most of his archive is stored by St. Andrews University, which seats just across the estuary from Dundee, if you ever visit the Mecca of golf. [If you are a golfer then you know what I am talking about ]

This is a link to the description of Valentine's archive:
https://archiveshub.jisc.ac.uk/sear...92c670e39608

... something on rhe first one:
http://collection.sciencemuseum.org...messrs-fores

... and on the third one:
http://collections.britishart.yale....cord/2042387

https://goscf.com/t/13791#13791 br /

The missing image

Results of ridicule.

Note: Mulready copies were produced in the US at Boston, Mass. and went through the mail.

Thanks for your inputs!