Juan de Solís Farfán was present at the 1540 muster as a horseman in Luna y Arellano's company. There are documentary records for both a Juan de Solís and a Juan de Farfán, but nothing except the muster for a Juan de Solís Farfán. Therefore, it is not clear if those records pertain to the expeditionary.
1540-1550:
1540, Feb.: Muster in Flint & Flint, Documents, Document 12 [three horses, native arms, Luna y Arellano's company]
Juan de Solís:
?AGI, Justicia, 272, Pieza 1, “Visita a los escribanos de la Ciudad de México, 1545-1546” [General questions of officials, 1545 [witness is Juan de Solís, does not sign his name];
?APSM, “Bautismos de Españoles, 1536-1746” [fol. 149v: 23 April 1545, padrinos Juan de Solís, tailor and his wife];
?APSM, “Bautismos de Españoles, 1536-1746” [fol.149r: 22 April 1545, Juan Fernández and his wife and Juan de Solís and his wife, padrinos];
?APSM, “Bautismos de Españoles, 1536-1746” [fol.176r: 3 Nov 1546 Juan de Solís and wife padrinos for daughter of Cristóbal Hernándes];
?Catálogo, Resumen e Índices [1565, Juan de Solís, natural de Sevilla, en Castilla, estante en México, otorga poder general a Pedro de Mora, procurador de causas, vecino. No firmó. Testigos: Juan de Herrera, Diego de los Ríos y Alonso de Medina, vecinos, que juraron conocer al otorgante]
?AGN, Instituciones Coloniales, GD72, Real Audiencia, Mercedes, vol.3, exp. 376, 1550 [fol. 130v: August 22, 1550: instruction to the alguacil mayor de México and tenedor de los bienes de difuntos concerning Rodrigo Álvarez, who has died in México intestate and left a key to a trunk (cofre) that belongs to a minor child and two acknowledgements of debt, as well as a key to the royal caja; order is given that the key to the caja is to be delivered to don Alonso Manrique, who has been named alcalde mayor de la provincia de Guazalcalco; the other key and the acknowledgements are to be delivered to Juan de Solís, who is a vecino de Tabasco and has brought a poder to collect Álvarez’s possessions];
?Catálogo, Resumen e Índices [19 Sep 1561, Juan de Solís, vecino de la villa de Tabasco, estante, otorga poder general a Alonso de Alcohola, procurador de causas, vecino. Firmó. Testigos: Diego Martínez, Gonzalo Hernández y Juan de Alcohola, vecinos y estantes]
1580-1590:
?AGN, Instituciones Coloniales, GD72, Real Audiencia, Mercedes, vol.14, 1588 [fol.107v: 20 May 1588, image 218; Juan de Solis, 2 sitios de estancia para ganado menor on the outskirts of San Baltasar, sujeto of Xcalpa en la falda del bocan el un sitio en espago que llaman Tlacguautl; 1000 cabecas; signed by Juan de Cueva];
?AGN, Instituciones Coloniales, GD72, Real Audiencia, Mercedes, vol.15, 1589 [fol.45v: Huexocingo; 2 sitios de estancia para ganado menor on the outskirts of Guexocingo, one in the part called Johuite and Huetian; 14 Sept 1589];
?AGN, Instituciones Coloniales, GD72, Real Audiencia, Mercedes, vol.14, 1589 [fol.363 (image 531): Juan de Solis, sitio de estancia para ganado menor on outskirts of Calpa, description of location; 31 Aug 1589]
Juan Farfán: ?AGI, Contaduría, 1784, N.3 [1542-47, Cuentas del contador in Lima, Juan de Caceres de lo que recibio para socorro de los soldados que acompanaron Gasca: Payments: Juan Farfán 100 pesos de socorro];
?AGN, Instituciones Coloniales, GD61, Inquisición, vol.32, primera parte, exp.2, 1560 [fol.70: 23 Feb 1560, Mérida, Juan Farfán, vecino of Valladolid; palabras malsonates, sentenced; native of Triana; signature copied; 30 pesos and public penitence; wife is Leonor Borges; no age given from Juan]