Austin led his party to travel in four weeks to San Antonio with the intent of reauthorizing his father's grant, arriving on August 12. While in transit, they learned Mexico had declared its independence from Spain, and Texas had become a Mexican province, rather than a Spanish territory. José Antonio Navarro, a San Antonio native with ambitious visions of the future of Texas, befriended Stephen F. Austin, and the two developed a lasting association. Navarro, proficient in Spanish and Mexican law, assisted Austin in obtaining his empresario contracts. In San Antonio, the grant was reauthorized by Governor Antonio María Martínez, who allowed Austin to explore the Gulf Coast between San Antonio and the Brazos River to find a suitable location for a colony. As guides for the party, Manuel Becerra and three Aranama Indians, went with the expedition.