Continuation of correspondence with Escandon concerning affairs along Costa del Seno Mexicano; epidemic of unspecified disease which has caused suspension of labor in mines of Sierra Tamaulipa; damage to corn crops and livestock caused by drought in 1764; petitions virrey to promote to rank of Mariscal; sends expedition to survey northern coastline of Nuevo Santander. Expedition describes complex system of outer sand banks, discovery of Island off of San Juan mission near mouth of Nuezes discovery of wreckages of English and French ships. Also includes accounts of establishment of three Villas along coast between mouths of Rios Grande and Nuezes, and of theft of livestock by Indians inhabiting Sierra Sihuy. (A. Tukey, July 1989)