Can’t help, but you might find this link interesting:
http://npplan.com/parks-by-state/puerto-rico-national-parks/san-juan-national-historic-site-park-at-a-glance/san-juan-national-historic-site-castillo-san-cristobal/san-juan-national-historic-site-dungeon-of-castillo-san-cristobal/#:~:text=In the San Cristóbal dungeon,where the galleons are drawn.
When my Dad was stationed at Fort Brooke (on the grounds of Castillo San Felipe del Morro) in Old San Juan, Puerto Rico during the early 1950s, we kids explored the 16th-18th century Spanish fortifications allthe time.
In the neighboring fort of San Cristobal there were some creepy dungeon chambers that had centuries old drawings & scratched etchings on the walls that fascinated me.
The colorful Hollywood pirate movies that were shown at the post theater were especially enjoyable since we were living in the middle of where it all happened in real life.
I was actually thrilled to discover the above website link today, because those sailing ship drawings on the dungeon walls are the very same ones I saw firsthand when we played pirates in those tunnels without supervision 71+ years ago.