because that the Romaines woulde that all these thinges, in which they bestowed so much diligence, should availe them, fleedde no otherwise the Winter, then the highe Alpes, and difficulte places, and whatsoever other thing shoulde let them, for being able to shewe their arte and their vertue.  So this suffiseth to your demaund, wherefore we wil come to intreate of the defending and besieging of tounes, and of their situacions and edifications.

THE SEVENTH BOOKE

[Sidenote:  Tounes and Fortresses maie be strong twoo waies; The place that now a daies is moste sought to fortifie in; How a Toune walle ought to bee made; The walle of a toune ought to bee high, and the diche within, and not without; The thickenes that a Toune walle ought to bee of, and the distaunces betwene everie flancker, and of what breadth and deapth the dich ought to bee; How the ordinaunce is planted, for the defence of a toune; The nature of the batterie.]

You oughte to knowe, how that tounes and fortresses, maie bee strong either by nature, or by industrie; by nature, those bee strong, whiche bee compassed aboute with rivers, or with Fennes, as Mantua is and Ferrara, or whiche bee builded upon a Rocke, or upon a stepe hille, as Monaco, and Sanleo:  For that those that stande upon hilles, that be not moche difficulct to goe up, be now a daies, consideryng the artillerie and the Caves, moste weake.  And therfore moste often times in building, thei seke now a daies a plain, for to make it stronge with industrie.  The firste industrie is, to make the walles crooked, and full of tournynges, and of receiptes:  the whiche thyng maketh, that thenemie cannot come nere to it, bicause he maie be hurte, not onely on the front, but by flancke.  If the walles be made high, thei bee to moche subjecte to the blowes of the artillerie:  if thei be made lowe, thei bee moste easie to scale.  If thou makeste the diches on the out side thereof, for to give difficultie to the Ladders, if it happen that the enemie fill them up (whiche a great armie maie easely dooe) the wall remaineth taken of thenemie.  Therefore purposyng to provide to the one and thother foresaid inconveniences, I beleve (savyng alwaies better judgement) that the walle ought to be made highe, and the Diche within, and not without.  This is the moste strongeste waie of edificacion, that is made, for that it defendeth thee from the artillerie, and from Ladders, and it giveth not facilitie to the enemie, to fill up the diche:  Then the walle ought to be high, of that heighth as shall bee thought beste, and no lesse thick, then two yardes and a quarter, for to make it more difficult to ruinate.  Moreover it ought to have the toures placed, with distances of CL. yardes betwen thone and thother:  the diche within, ought to be at leaste twoo and twentie yardes and a halfe broad, and nine depe, and al the yearth that is digged out, for to make the diche, muste be