Listen to this “5 Minutes in Church History” about David Brainers’s Hebrew Dictionary at the link below. I’ve done a little research and found out that this dictionary was originally bound like any other book, but then recovered with this otter skin sometime later. The otter skin was already being used for another purpose, but repurposed as the book cover that we see today. I am trying to get some close up photos of how this otter skin is attached. I assume that it was attach similarly to the photo below. This photo is an example of pretty standard overlapping binding techniques used during this period.