D.M. Procida wrote:
I stepped on a drawing pin, and now my leather soled-shoe lets in
moisture - just walking over damp ground is enough to get a wet sock.

Is it possible to repair this myself?

Daniele

You could try the "cure all" that a lot of tradesmen (and diy'ers) swear
by ------ a spot of silicone mastic!

Or pop into one of the little shoe repair/key cutting shops that seem to be
in Cardiff and ask them to plug the hole with whatever 'professional' gunge
that they use (should only cost around a couple of pounds).