David in Normandy wrote:
Ouch!

Indeed! :-)

Anyway, today I was in a bargain shop and saw moth-balls going cheap so
I bought a packet. Came home and could I find the hole beneath the
mole-hill? No way. No sign of a hole anywhere. I had carefully
removed the soil and stones that the creature had tossed up and I had
then carefully prodded the exposed ground with a thin bamboo stick,
hoping to locate the hole. Nothing doing!

Guys, how do I locate the hole! :-)

Eddy.