The art of fortification, or architecture militaire as vvell offensiue as defensiue, compiled & set forth, by Samuell Marolois revievved, augmented and corrected by Albert Girard mathematician: & translated out of French into English by Henry Hexam

The 33 Plate, and 140. Figure.

ABout the entrenchment of a Campe, there are made some gapps, avenues, and passages for men, and waggons to goe out, and in, which haue noe ditches, or ramparts, some being 6, 7, or 8, foote vvide, as occasion serues, shutt in vvith a vvodden gate, or Turnepikes made of sparrs some tvvo ynches and a halfe thick in diameter, and about fiue or six foote high, plated with yron heads at the points, and having tvvo great Iron nailes driuen through them eight or nine ynches long, and blund headed on the other side of the thicknesse of an ynch, halfe an ynch, or thereabouts; they are pointed to driue them in the better into the ground in two places, to stopp vp the passage, as the 33 Plate, and the 140 Figure shevveth,

which pikes three or foure rowes of them, must be driven in closse one to another as high as a mans girdle, vvhich is about 3 foote, or three foote and a halfe, the first and vtmost rovv must be driven into the ground deeper then the other, and so the one aboue the other rovv, that they maye not be pulled vp. These are of good vse also to be driuen in vpon the topp of a breach (as S^r. Francis Vere did in Ostend) vvhen an Ennemy is ready to giue an assault, and that one hath not time enough, to cast vp a breast of Earth vpon it. These and an other Instrument called in Dutch a frize Ruyter, and by vs a turnepike (as also your quadrangular tanternailes cast dovvne vpon a breach) are of singular vse, to barrocadoe, and stopp vp places▪ A Turne-pike is made in this manner follovving: