Item in extremis angulis cum recessum fuerit ab interiore angulo spatio altitudinis substructionis, in utramque partem signetur, et ab his signis diagonius structura conlocetur, et ab ea media altera coniuncta cum angulo muri.
Further, in the outer angles of the substructure, taking a distance from the internal angle equal to the height of the substructure, we must mark a point on either side and a diagonal wall is to be built between them, and from the middle of the diagonal wall, another wall is to be built to the interior angle of the main wall.
final_alignments\Vitruvius_Architecture_Book_6.json