“I’ll bring my lumping hammer!” was a typical response from Barbara’s dad, Bill, when I was explaining some garden DIY job that I had in mind.
Lump in Middle English is a ‘shapeless piece’. In Swedish it could mean a ‘block’ or ‘log’. Lumping stuff about in Yorkshire dialect refers to carrying heavy loads from place to place.
The other hammer was my dad’s and I think this is the one referred to as the ‘coal hammer’. As he worked for the National Coal Board he was entitled to concessionary coal deliveries. Our Victorian house had two coal houses and, if I remember correctly, the far coal house was the one with the larger lumps of coal which occasionally needed breaking up with the hammer.