The question regarding the origin of Ham-handed (ham-fisted).
First recorded 1876:
http://newspaperarchive.com/articles/?py=1876&pep=ham-handed
Did it originate from earlier expression? ham-like a hand; a hand like a ham?
'If there be, as we devoutly believe, honour among thieves, sure we are it
is alloyed with envy: a men with a hand like a ham cannot complacently
view the snaky palm of a more perfect brother.' Blackwood's Eidinburgh
magazine. 39 t. 1836