Includes copies of documents from Fernando VI, others, regarding construction of Casa de Moneda in Guatemala in 1740's; information used by Constanzo as guideline for construction of casa de moneda in Arispe in 1780's. Machinery used in minting of coins, such as corte, torculo de Cordon, Volante, etc, described. King suggests exploitation of Mineral wealth in Sonora and Nueva Vizcaya, proposes construction of casa de moneda in region; viability of plan discussed, disadvantage being lack of funds to mine area effectively, advantages including proximity of Casa to mines and key ports. King orders construction of Casa in Arispe, 3-2-1782; Constanzo named ingeniero in charge, lists tools to be provided to each carpinter and 'herrero' as well as wages for several operarios and maestros; Constanzo explains that delay in executing royal order due to shortage of sujetos de havilidad y conducta. (L. Kerr, may 1989)

Croix solicits virrey's financial and moral support in construction of casa de moneda in Arispe; Croix contends that it will help province greatly. Provides notas listing number and type of skilled laborers, tools needed to complete job (folio 209). (L. Kerr, may 1989)