You have to book an appointment to look at the museum, but this is easy enough to do from the shop next door. The museum itself is a little small, but the lady that gives you the tour (which largely consists of a narrative history whilst stood mostly in one place) is very knowledgeable about the island and it's history and can point out a lot of photos. Really fascinating descriptions of island life and culture and recommended for that. Allow an hour.
Fascinating history, wonderful museum guide
Our historical museum about the island of Spanish Wells.