Dudley D. Watkins

From the eBay listing:

I don't know what story this is originally from. But it's a braw wee lad in a kilt wi' daggers in the nicht about to blah up an English Gaol, d'ya ken :)

From Wikipedia:

Dudley Dexter Watkins (27 February 1907 – 20 August 1969) was an English cartoonist and illustrator. He is best known for his characters Oor Wullie and The Broons; comic strips featuring them have appeared in Scottish newspaper The Sunday Post since 1936, along with annual compilations. Watkins also illustrated for comics such as The Beano, The Dandy, The Beezer and Topper, and provided illustrations for Christian stories.