Had mole traps in the garden of this fine pad for 7 days, caught three moles. Great.
Left the traps a further 3 days - just in case a straggler turns up (the lawn is billiard table spec) - nothing.
Knock on the door to collect the money, only to be frog marched to the other end of the property where the lady of the house says she has just found more workings.
Don't get me wrong - they all count, it's just that this feller has obviously been rooting around this patch for a few days - and I could have mopped him up with the rest of 'em if I'd have known he was there.
One thing I have learnt about mole catching - no two jobs are the same and it's often the 'human factor' not the 'mole factor' that makes it that way.