Mr. Bonaventura was a character of Italian cartoons at the beginning of 1900. The stories ended usually with the protagonist getting a one million cheque for same reason (later on, with inflation, it became a one billion cheque).
Bonaventura best friend was a mule, called la Checca who’s main feature was an irresistible impulse to kick anything at reach.
I had a book with some of those stories and I read it many times.
And this is my version of Mr. Bonaventura.
PS I realise now that I was confusing Mister Bonaventura with another character, ‘Fortunello’. He was the friend of the mule, but my sketch is rather inspired to Mr. Bonaventura, the ‘millionaire’.