Not so frequently employed, but still occasionally met with in ancient history, was the ordeal of compurgation, where the innocence of the accused was sworn to by his friends, and judgment went against the party whose kindred refused to come forward, or who failed to provide the necessary number of compurgators. It was a conflict of numerical strength, and the higher number carried the day. Another custom, still surviving, was to tie a key in a Bible opened at Psalm L, verse 18, "When thou sawest a thief, then thou consentedst with him," and balance the whole, the belief being that the book would turn in the hands of a guilty person. Challenging the accuser to mortal combat was a proceeding which found much favour with the warlike spirit of the middle ages. Of course it was considered that Providence would defend the right, even if a miracle were needful, but nevertheless each party placed considerable reliance on his own strength of arm and fighting skill. These judicial combats were in ancient times practised among the Jews, and were also common in Germany in remote ages, though they do not find mention in Anglo-Saxon laws, and were apparently not in use in England until after the Norman Conquest. In Germany a bier was placed in the midst of the lists, accuser and accused stood respectively at the head and foot, and remained for some minutes in profound silence before they commenced fighting. Civil, criminal, and military cases were, in the absence of sufficient direct evidence, decided by means of the judicial combat or wager of battel. The offended party had the right to challenge his accuser to settle the dispute by force of arms, and the forms and ceremonies connected with the trial are well illustrated in the opening scenes of "King Richard II." The combat took place in the presence of the court itself, Heaven being expected to give the victory to the innocent or injured party. It was commonly resorted to in charges of treason, as in the above-mentioned dispute between Henry Bolingbroke and Thomas Mowbray, when the ceremonies were of an imposing character. As in the majority of ordeals, deputies could be chosen to perform the requisite duties, but the principals were in all cases answerable for the consequences. No commoner was allowed to challenge a peer of the realm, nor could the citizens of London, for some obscure reason, indulge in these popular forms of legal administration. Each of the combatants professed his willingness to make good his claims, body for body-- "For what I speak My body shall make good upon this earth, Or my divine soul answer it in heaven."