All that is known for certain is that Bartolomé Serrano was present at the 1540 muster as an unassigned horseman. However, because there are so few documentary references to any Bartolomé Serrano it may be that those that exist pertain to the expeditionary. Also, there is a Pasajero record for a Bartolomé Serrano bound for Santo Domingo in 1537 along with three other future expeditionaries. It is highly likely, therefore, that Bartolomé was a native of Plasencia (Cáceres province) and the son of Bartolomé de Serrano and Constanza López.
1530-1540:
?AGI, Pasajeros, L.2, E.3443 = Boyd-Bowman, Indice geobiográfico, II:3069 [February 5, 1537, Bartolomé son of Bartolomé de Serrano and Constanza López, citizens of Plasencia, to Santo Domingo] (fellow expeditionaries-Pedro Nieto, #3445, Francisco de Santillana, #3447, Juan Navarro, #3448)]
1540-1550:
1540, Feb.: Muster in Flint & Flint, Documents, Document 12 [two horses, elk hide jacket, native arms]
1570-1580:
?Catálogo, Resumen e Índices [31 Jan 1570, Mexico, María de Saldaña, viuda de Bartolomé de Perales, vecina -como tutora y administradora de su hija legítima, Antonia de Campos, en virtud del testamento de su marido- (VER ANEXO (not included) otorga poder general a Diego Baeza del Río. Testigos: Cristóbal de Frías, Bartolomé Serrano y Andrés de Morales, vecinos y estantes]
After 1590:
?AGN, Instituciones Coloniales, GD51, Gobierno Virreinal, General de Parte, Vol.4, exp.403, 1591 [fol.117v: 6 April 1591, Pánuco, vecino, made a report to Viceroy Velasco that he has some sitios de estancias poblados con yeguas which have been damaged; asking for No Trespassing authority]
?AGN, Instituciones Coloniales, GD72, Real Audiencia, Mercedes, vol.18, 1591 [fol.73v (image 156): 30 Nov 1591, grant to Bartolomé in the name of his son, Luis; un sitio de estancia para ganado mayor y un portrero on the outskirts of Calpa; Bartolomé has casas and corrals there also; alcalde mayor of Pánuco to investigate];
?Aguirre Carrasco, Testimonio [p. 72-73: 1592, debt of 1, 325 pesos is owed to Melchor de Covarrubias by Juan de Cuéllar and Francisco Gutiéres, mercaderes y vecinos de México, for 150 arrobas de grana (cochineal) that he had sold them; debt of 1,160 pesos is owed to Covarrubias by Alonso Hernández and Miguel Hernández for 20 arrobas de grana (cochineal) that he had sold them; debt of 640 pesos is owed to Covarrubias by Juan de Cuéllar, Juan de Contreras, and Francisco Gutiérrez, according to a promissory note; debt of 2,000 pesos is owed to Covarrubias by Bartolomé Serrano, vecino de Cholula; Juan de Contreras had also been commissioned to collect a debt for Covarrubias]
Other info: ?Piferrer, Nobiliario, 4:80-81, #1654 [family name came from Leon, then spread out to Ávila, Andujar, Jaén, Alcalá la Real and America; there were Juan Serrano and Cristóbal Serrano, brothers, during Carlos V and Juana, in the pueblo of Villafer, León, 1549, they earned their carta ejecutoria; escudo of silver with a lion de gules]