Enigma

I could bore you with more tales of decorating but I won't, plenty of time for that tomorrow. Instead I explored the outbuildings (two of which I have already demolished as they were in such a state). Finally managed to get into a decent sized shed, good work benches with a vice, ample shelving, lighting (no idea where switch for it is). Well pleased with it.

Then we saw this on the wall, 14 nails numbered 10 to 24. we puzzled at length. Perplexed we were as to the function, so much so I had to e-mail the previous owner.