This was new to me. A gentleman brought in an early 19th century calf binding. On the for-edge I noticed a split vertically in the paper. Upon opening the old book the binding was actually two books bound as one. Meant to complement one another with the Psalms on top and the “musick” on bottom.
The book is a tightback and the leather is fragile, but should lift without too much drama. The boards are OK, but the corners are very bruised. Some splaying and reforming are in order. A couple pages front and back need mending, too. Stay tuned to this Bat Channel for further details!