An instrument of military defence consisting of an iron frame of four points, and called a _Caltrap_ (Fig. 505) or _Galtrap_ (and sometimes a Cheval trap, from its use of impeding the approach of cavalry), is found in the arms of Trappe ["Argent, three caltraps sable"], Gilstrap and other families; while French armory supplies us with another example in {284} the case of the family of Guetteville de Guénonville, who bore for arms: "D'argent, semée de chausse-trapes de sable." Caltraps are also strewn upon the compartment upon which the supporters to the arms of the Earl of Perth are placed. As the well-known badge of the Royal House of Tudor, the _Portcullis_ (Fig. 506) is familiar to any one conversant with Henry VII.'s Chapel at Westminster Abbey, but it also appears as a charge in the arms of the family of Wingate ["Gules, a portcullis and a chief embattled or"], where it forms an obvious pun on the earliest form of the name, viz. Windygate, whilst it figures also as the crest of the Dukes of Beaufort ["A portcullis or, nailed azure, chained of the first"]. The disposition of the chains is a matter always left to the discretion of the artist. [Illustration: FIG. 506.--Portcullis.] [Illustration: FIG. 507.--Beacon.] [Illustration: FIG. 508.--Grenade.] Examples of _Beacons_ (Fig. 507) are furnished by the achievements of the family of Compton and of the town of Wolverhampton. A _fire chest_ occurs in the arms of Critchett (_vide_ p. 261). _Chains_ are singularly scarce in armory, and indeed nearly wholly absent as _charges_, usually occurring where they do as part of the crest. The English shield of Anderton, it is true, bears: "Sable, three chains argent;" while another one (Duppa de Uphaugh) has: "Quarterly, 1 and 4, a lion's paw couped in fess between two chains or, a chief nebuly of the last, thereon two roses of the first, barbed and seeded proper (for Duppa); 2 and 3, party fess azure and sable, a trident fesswise or, between three turbots argent (for Turbutt)." In Continental heraldry, however, chains are more frequently met with. Principal amongst these cases maybe cited the arms of Navarre ("Gules, a cross saltire and double orle of chains, linked together or"), while many other instances are found in the armories of Southern France and of Spain. _Bombs_ or _Grenades_ (Fig. 508), for Heraldry does not distinguish, figure in the shields of Vavasseur, Jervoise, Boycott, and many other families. {285} Among the more recent grants _Cannon_ have figured, as in the case of the Pilter arms and in those of the burgh of Portobello; while an earlier counterpart, in the form of a culverin, forms the charge of the Leigh family: "Argent, a culverin in fess sable." [Illustration: FIG. 509.--Scaling ladder.] [Illustration: FIG. 510.--Lance or javelin.] [Illustration: FIG. 511.--Tilting-spear.]