Concerns progress and present condition of presidios of Monclova and Aquaverde in Coahuila; notes include; comments on excessive costs; shortcomings of 4000 pesos allocated for construction of new presidios of line; expediance of changing from stone to Adobe as a building material at these two presidios; many references to an instructive paper on presidial construction produced by unidentified engineers; numbers of workman available; notes absurdity of plan of engineers that called for curtain walls 200 Varas on a Side; foundations 2.5 Varas thick and exclusive use of stone in construction of new fortresses of line. (J. Williams, April 1987).