Does any one know of the artist marguerite evans who sketched quentin crisp as the civil servant in 1946?

we have a print of quentin crisp as the naked civil servant done by marguerite evans but cant find anything on the net about it if any one knows any thing id be gratefull thanx

Does any one know of the artist marguerite evans who sketched quentin crisp as the civil servant in 1946?
The National Portrait Gallery has a oil on canvas version that sounds like what you've got. See the link below.





But I can't find any info about the artist - sorry.