Directing a horse with your heels
Bit of a noddy question but I'm sure you guys can help me:
I'm a writer of historical fiction, and I often refer to my characters 'heeling' their mounts into a canter/gallop etc.
I was wondering if this method is or at least was a genuine one (it is used widely in other fiction I have read). More specifically, if it was a real technique, how would you instruct a horse to turn left? Would you heel its left or right flank?
Many thanks in advance!