In 1644, Edmond Felton, gentleman, published a pamphlet entitled, “Engins invented to save blood and moneys;” the nature of which he “discovered unto the Committee for the fortifications of the City of London.” The Honourable Major General Skippon attested in respect of it, that the engine “was of three tiers of ten muskets in a tier, to shoot arrows withal.” The inventor satisfied the Committee, “how an engine will secure the foot from the horse, and the soldiers from musket shot, which engine in fair ways two men may manage at pleasure.” He complains of a piracy of his invention, observing, “There was about twenty of the said engines made at Oxford, and from thence carried to Gloucester, to go up to the walls. And had not his Excellency the Earl of Essex so happily arrived to raise the siege as he did, it was reported by some of the army, the city was in great fear to be taken thereby; most of which said engines the besiegers burnt, because they should not be taken.” In the second volume of “Bibliotheca Gloucestrensis: a collection of scarce and curious tracts, by John Washbourn, jun. Gloucester. 4to. 1825,” there is a reprint of “Corbet’s Historicall relation of the Military Government of Gloucester, 1645,” which contains this passage: “Wherefore besides their mine and battery, they framed great store of those unperfect and troublesome engines to assault the lower parts of the city. Those engines ran upon wheels, with planks musket-proof placed on the axle-tree, with holes for musket-shot and a bridge before it, the end whereof (the wheels falling into the ditch) was to rest upon our breast works.” Page 54. And in the reprint of “A briefe and exact diurnall of the siege before Gloucester, by John Dorney, Esquire, 1643,” we meet with the following:--“Munday, September 4. We understood likewise that the enemy had by the direction of that Jesuitticall Doctor Chillingworth, provided great store of engines after the manner of the Romane Testudines cum Pluteis, with which they intended to have assaulted the parts of the city, between the south and west gates. These engines ran upon cart wheeles, with a blinde of plankes musquet proofe, and holes for foure musquetiers to play out of, placed upon the axeltree to defend the musquetiers and those that thrust it forward, and carrying a bridge before it; the wheeles were to fall into the ditch, and the end of the bridge to rest upon our brest-workes, so making severall compleat bridges to enter the city. After the raising of the siege, we tooke all these engines, and brought them into the towne.”--Page 225.