 Complete the following phrase:  The Concordat of London, agreed in 1107, was a forerunner of a compromise that was later taken up in the Concordat of Worms. In England, as in Germany, the kings chancery started to distinguish between the secular and ecclesiastical powers of the prelates. Bowing to political reality and employing this distinction, Henry I of England gave up his right to invest his bishops and abbots while reserving the custom of requiring them to swear homage for the temporalities the landed properties tied to the episcopate directly from his hand, after the bishop had sworn homage and feudal vassalage in the commendation ceremony commendatio, like any secular vassal. The system of vassalage was not divided among great local lords in England as it was in France, since the king was in control by right of the 