I have been told by someone who has been described as a "fish botherer" that anglers use them for bait.

According to BBC Radio 4 this morning, Carlin (or Carling) Howe means "Witch's Hill". This is confirmed by an entry online citing the Oxford Dictionary of English Place Names:

https://teessidepsychogeography.wordpress.com/tag/carlin-howe/

Does this mean that Carlin[g] peas are "witches' peas"?