Referring to Hacienda La Romana , the1902 book Biografia de las Riquezas de Puerto Rico  by José Ferreras Pagán states; "...it has been the property of diverse at different times, being the McAllister brothers until this year."  Ferreras Pagán reference to the McAllister brothers was to Pablo McAllister Fagundo (1866-1909) who was married to Maria Aperteguia, Carlos McAllister Fagundo (1872-1903) who never married and Claudio McAllister Fagundo (1873 - ) who married Hipólita Irizarry López.  According to Ferreras Pagán, in 1902 Hacienda La Romana consisted of three hundred ninety seven acres of which approximately twenty were used to grow sugarcane producing approximately sixty hogsheads of sugar.  Ferreras Pagán states its owner that year was Francisco E. Martinez.

The Cabo Rojo Historical Society has a different history for this hacienda.  Its facebook page contains a summary which translated states; 

"It is located in the Guaniquilla Sector, Pedernales neighborhood, within the Punta Guaniquilla Nature Reserve.  It was owned by Gumersindo Cofresí y Rios, uncle of the pirate Roberto Cofresí.  Luis Pumarada in his inventory, calls it Hacienda Cofresí.  In 1882, it was composed of two hundred ninety two cuerdas of land destined for cane and cattle, fruit trees and coconut palms.  In its center was a sugar factory that contained a house and establishments for the elaboration of sugar, a wooden mill with galvanized iron mallets and two large wooden structures to dry bagasse.  It produced seventy hogsheads of sugar when it was owned by Francisco E. Martinez.  In 1884, Daniel Pabón Irizarry bought the farm from Antonio Cofresí.  Pabón Irizarry's widow sold it to Francisco E. Martinez for $9,000 in installments in 1903."

La Gaceta de Puerto Rico edition of February 26,1870 recounts the proceedings of a court case filed by freed slave Josefa Monsanto against Monserrate Rios de Cofresí.  The court document refers to Monserrate Rios de Cofresí as owner of Hacienda La Romana.  It also refers to her son as Antonio.

Based on information available on the history of the Cofresí family of Cabo Rojo by Dr. Ursula Acosta, the first Kupferschein (Cofresí) that arrived in Puerto Rico from Trieste was Francesco (Franz) Giuseppe Fortunato von Kupferschein (1751-1814) who settled in Cabo Rojo in 1782 and in 1874 married Maria Germana Ramirez de Arellano Segarra (1765- ).  They had four children; Juana (1785- ), Juan (1787- ), Ignacio (1789- ) and Roberto (1791-1825) Cofresí Ramirez de Arellano. That being the case, it is unclear who the Gumersindo Cofresí y Ríos referred to by the Cabo Rojo Historical Society was, but he was for sure not the uncle of the pirate Roberto Cofresí.  It is reported that Franz must arrived in Cabo Rojo with considerable funds because he bought land.  This land was then probably inherited by Ignacio as Juan was a businessman and co-owner of the ship Monserrate with Luis del Rio, the father of Maria Monserrate del Rio Carbonell, Ignacio's wife.

Maria Monserrate del Rio Carbonell (1791-1883) also known as Monserrate Rios de Cofresí inherited the hacienda upon her husband Ignacio's death sometime before the 1870 court case referenced above.  Ownership of the hacienda then passed from Monserrate to her son Antonio Cofresí Rios (1834- ) who sold it to Daniel Pabón Irizarry (1830-1890) in 1884.  Pabón Irizarry's widow Maria Dolores Alves del Toro then sold it to its last known owner Francisco E. Martinez.

There is then doubt about ownership by the McAllister brothers as stated by Ferreras Pagán, but there is no doubt about the ownership by Francisco E. Martinez although his year of acquisition was most likely 1902 rather than 1903. Its ruins are in Barrio Pedernales near "Punta Guaniquilla" close to the coast on the north side of Boquerón Bay.