If it’s folklore you want it’s folklore you get! This work starts out as a slightly dry, historical look at the druids, before becoming almost a completely different work which combines a bit of Masonic and Catholic pagan symbolism (the kind you find on the ‘weird’ side of the internet) with then-modern folklore both in and out of the British Isles. Considering the dedication passage it is likely that the work was written in two stages, accounting for this.
It speaks at length about all things druid for the first two sections before meandering into very interesting multi-page compilations of simple lore, with some poetry and folk magic included. The section on pins used in divination was of especial interest since this tradition indeed managed to find its way into multiple fortune telling works I myself have already edited.