FABRICIO. You have not understoode well, because that place cannot be now a daies called stronge, wher he that defendeth it, hath not space to retire with new diches, and with new fortificacions, for that the force of the ordinance is so much, that he that trusteth uppon the warde of one wall and of one fortification only, is deceived: and because the Bulwarkes (mindyng that they passe not their ordinarie measure, for that then they shoulde be townes and Castels) be not made, in suche wise that men maie have space within them to retire, thei are loste straight waie. Therefore it is wisdom to let alone those Bulwarkes without, and to fortifie thenterance of the toune, and to kever the gates of the same with turnyngs after suche sort, that men cannot goe in nor oute of the gate by right line: and from the tournynges to the gate, to make a diche with a bridge. Also they fortifie the gate, with a Percullis, for to bee abell to put therin their menne, when they be issued out to faight, and hapnyng that the enemies pursue them, to avoide, that in the mingelynge together, they enter not in with them: and therfore these be used, the which the antiquitie called Cattarratte, the whiche beyng let fall, exclude thenemies, and save the freendes, for that in suche a case, men can do no good neither by bridges nor by a gate, the one and the other beynge ocupied with prease of menne. BAPTISTE. I have seene these Perculleses that you speake of, made in Almayne of littell quarters of woodde after the facion of a grate of Iron, and these percullises of ouers, be made of plankes all massive: I woulde desire to understande whereof groweth this difference, and which be the strongest. [Sidenote: Battelments ought to be large and thicke and the flanckers large within.]