Hip bone no longer connected to the thigh bone

I found this photo of a "bone pile, Cuban cemetery" at Sloth Unleashed.  A search of the web resulted in two not-quite-compatible explanations.  Gering Citizen said that History Detectives on the Discovery Channel couldn't find any relevant information after months of research because they couldn't go to Cuba, and postulates that the image depicts terrible suffering of the Cubans under Spanish occupation, possibly leading to the Spanish-American War.

The second explanation, at Creating Pictures in My Mind, is that in Havana in the 1890s, graves were "rented" for five years, and after that time could be reused with the bones disinterred and discarded onto this pile.