now a part of Bristol. If you look on the wonderful Perusasion Gazetteer you can see. It is an interesting place at this time (ie 1806, which would have been when the Musgroves were there). There had been a building boom in the late 1780s with some huge terraces to rival those at Bath being planned (for eg Royal York Crescent, see the link below) and started. Clifton is up a hill from Bristol city centre, and the idea had been to create a pleasanter, airier residential area. There was a Spa of sorts ('The Hotwell') flowing from the rocks of the Avon Gorge - Clifton is set up above the Gorge, and Assembly Rooms were planned. However, with the advent of war in 1793 the financial underpinnings of the bulding boom collapsed and many of the terraces were left semi built for most of the ensuing two decades. The Assembly rooms were not built until after 1806, opening in 1812. At the time the Musgroves were there, I imagine Clifton being quite an eerie place, full of half built houses!
Refs: Walter Ison The Georgian Buildings of Bristol, Timothy Mowl To Build the Second City