First, a definition, courtesy of Forthright's Favourite Words:
Growlery growl'er-ee, n (English; cf. Dutch grollen, to grumble)
A retreat for times of ill humour. This term has largely become obsolete, which is strange, given that so many people seem to have a place to go when they are in a bad mood — a place to be alone and think. It's similar in meaning to the Latin-derived sanctum sanctorum, with the added connotation that the individual in question is going to the place to be alone while upset.
Who can resist a word like that?
Growlery appears in Dicken's Bleak House, most famously in chapter eight: "This, you must know, is the growlery. When I am out of humour, I come and growl here." The word appears elsewhere in that book, too, as this search demonstrates.
You're welcome to browse through the public parts of the site. Perhaps you'll find something useful, or perhaps you'll just find something to growl about.