Well, the bricks I've seen drilled have all been inside, mostly in the
fireplace, as elsewhere they are covered in plaster, so I can't see
what's going on. About a quarter are black (but probably because they
formed the flue, although there isn't much of a pattern), most are
cracked.

I should mention that the brick front facade is excellent with a mixture of
grey, yellow and red brick in the local Reading brick fashion. It's a shame
the presumably original roof slates haven't lasted as well.

Christian.