in the secreteste place of their bodies:  other have hidden them in the collor of a Dogge, that is familiare with hym, whiche carrieth theim:  Some have written in a letter ordinarie thinges, and after betwene thone line and thother, have also written with water, that wetyng it or warming it after, the letters should appere.  This waie hath been moste politikely observed in our time:  where some myndyng to signifie to their freendes inhabityng within a towne, thinges to be kept secret, and mindynge not to truste any person, have sente common matters written, accordyng to the common use and enterlined it, as I have saied above, and the same have made to be hanged on the gates of the Temples, the whiche by countersignes beyng knowen of those, unto whome they have been sente, were taken of and redde:  the whiche way is moste politique, bicause he that carrieth them maie bee beguiled, and there shall happen hym no perill.  There be moste infinite other waies, whiche every manne maie by himself rede and finde:  but with more facilitie, the besieged maie bee written unto, then the besieged to their frendes without, for that soche letters cannot be sent, but by one, under colour of a fugetive, that commeth out of a toune:  the whiche is a daungerous and perilous thing, when thenemie is any whit craftie:  But those that sende in, he that is sente, maie under many colours, goe into the Campe that besiegeth, and from thens takyng conveniente occasion, maie leape into the toune:  but lette us come to speake of the present winnyng of tounes.  I saie that if it happen, that thou bee besieged in thy citee, whiche is not ordained with diches within, as a little before we shewed, to mynde that thenemie shall not enter through the breach of the walle, whiche the artillerie maketh:  bicause there is no remedie to lette thesame from makyng of a breache, it is therefore necessarie for thee, whileste the ordinance battereth, to caste a diche within the wall which is battered, and that it be in bredth at leaste twoo and twentie yardes and a halfe, and to throwe all thesame that is digged towardes the toun, whiche maie make banke, and the diche more deper:  and it is convenient for thee, to sollicitate this worke in soche wise, that when the walle falleth, the Diche maie be digged at least, fower or five yardes in depth:  the whiche diche is necessarie, while it is a digging, to shutte it on every side with a slaughter house:  and when the wall is so strong, that it giveth thee time to make the diche, and the slaughter houses, that battered parte, commeth to be moche stronger, then the rest of the citee:  for that soche fortificacion, cometh to have the forme, of the diches which we devised within:  but when the walle is weake, and that it giveth thee not tyme, to make like fortificacions, then strengthe and valiauntnesse muste bee shewed, settyng againste the enemies armed menne, with all thy force.  This maner of fortificacion was observed of the Pisans, when you besieged theim, and thei might