Good information from Footnote.
New data from Puerto Rico consists of the Central Registry of Slaves from 1872. (Registro Central de Esclavos.) Although in Spanish they are easy to read.
This record set resulted from Ley Moret of 1870 which was a law granting freedom to certain slaves in Puerto Rico. They are listed under the municipality in which they lived. Information for each slave may include name, country of origin, present residence, name of parents, sex, marital status, trade, age, physical description, and master’s name. (These schedules are in Spanish.)
There were 6 districts from which the data is taken, and it is an interesting look at slavery in Puerto Rico.
(See image attached.)