"Four such trenches radiating from a common central chimney will give one flue for use whatever may…
"A still greater economy of fuel can be effected by digging a similar trench in the direction of the…
Detail from a larger engraving of the siege of Boulogne in 1544 during the campaigns of Henry VIII in…
"Part of Trench, with A, Fascines, and B, Gabions: in fortification, a large basket of wickerwork constructed…