This is a drawing a did as a Christmas present for my sister. Alot of my illustrations are a play on words...'a load of old cobblers' also means nonsense, rubbish. This is a classic of Cockney rhyming slang.
It has nothing directly to do with shoemakers but originates from
'cobblers' awls', the pointed hand-tools that cobblers use to pierce
holes in leather. The rhyme is with 'balls', meaning testicles.