In addition to the Hwicce link, the description of a pool surrounded by a wall matches well with the formation of Bath's baths around a central walled pool*. In addition, the (8th C?*) Saxon poem The Ruin from the 10th C Exeter Book, which is likely to be set in Bath because of its mention of natural hot springs and massive ruins, matches the same description well:

Mood quickened mind, and a man of wit, / cunning in rings, bound bravely the wallbase / with iron, a wonder... / wide streams welled / hot from source, and a wall all caught / in its bright bosom, that the baths were / hot at hall's hearth, that was fitting... / Thence hot streams loosed, ran over hoar stone,... / into the ring tank.*