250 The Period of Constitution Making ticra and other engagements into which he entered, in 1172. After the murder, it was impossible for him to en- force Ms claims over criminous clerks; the matter was passed over in silence. In the years that followed, how- ever, the clergy got into some logical difficulty by having it pressed home to them that if the clerical murderer of a layman could escape punishment by death, there ought to be reciprocity and the lay murderer of a clerk enjoy the same immunity. The fact that Becket's murderers were unpunished lent some point to this argu- ment. The clergy began to feel uncomfortable, doubting whether their lives were safe. This situation made it possible for Henry, in 1176, to gain a concession; but in doing this he was forced to a more formal allowance of the church's claims over criminous clerks than he had yet made. A papal legate was in England at the beginning of the year, and he conceded that Henry could try clerks in his own court for forest offences; on the other hand, he received a letter from Henry to the pope in which the king agreed that murderers of clerks should not be exempt from punishment, and that, except for forest offences and cases which grew out of a clerk's holding a lay fee with a lay service attached, no clerks should be brought in person before his courts.1 This concession may be regarded as formally inaugurating "benefit of clergy." The precise terms upon which the clergy enjoyed their "benefit** varied from age to age, but, in general, they became more lax. The core of "benefit of clergy" was this: when an accusation was brought against a clerk in a lay court, his bishop might appear and demand that he be turned over to the church court for trial; bishops regularly made this demand, and there could be no further punish- ment than the church courts were competent to inflict.8 1 Adams, The Hisfoty of England (1066-1216), p. 319. 2 The strangest factor in the survival of this practice in England is that it was out of harmony with the best authority in the church itself. Mait- land says: ". . . that opinion, though owing to his (Becket's) martyr- dom it was suffered to do immeasurable mischief in England by fostering crime and crippling justice, was never consistently maintained by the