Here's some photos I took in a fascinating shop on Royale St. in New Orleans back in 1995.I believe these were for sale. The first pic (skulls) were listed as- '100 to 200 Hundred Year Old Bound Yoruba Skull' and '2500 year old Egyptian Mummy Head'.
Just imagine the remains of your grandparents on display like that, and worse, up for sale. Not something that should be shown as interestig items, imo.
Although a number of cultures have practiced cranial deformation, the only African example is among the Mangbetu in the Congo, not the Yoruba.