What is "wheesht"

Usage examples of "wheesht".

There were nights of it when he was here on sentry, the place a' wheesht, the frosts o' winter maybe riving in the wa's, and he would hear ane o' the prisoners strike up a psalm, and the rest join in, and the blessed sounds rising from the different chalmers - or dungeons, I would raither say - so that this auld craig in the sea was like a pairt of Heev'n.