We have now come to a time when Domesday gives us some interesting information. A commencement had been made of endowing separate stalls. Certain of the estates were parcelled out in this way, partly because they may have been safer from alienation, partly that the canons might be responsible, if necessary, for the services of religion in the manors and townships in which their endowments, technically known afterwards as _corpses_, were situated. In Domesday, St. Pancras, Rugmere (in St. Pancras), and Twyford, in Willesden, appear, and may fairly be set down as the three original _prebends_, although the term "prebend" does not yet appear, neither do the distinctive names of the stalls. To these three some would add Consumpta-per-Mare in the Essex Walton, so called because the glebe was _consumed_ by the encroachments of the sea. We will dismiss this obscure subject by anticipating a little, and stating that, what with parts of the old endowments and what with additions, by the end of the twelfth century the thirty prebends were complete. The names and inscriptions will be found in the account of the interior of the present Choir. The two Caddingtons were a gift in Bedfordshire in the diocese of Lincoln; the remaining twenty-eight were in Middlesex and Essex. The corporate property of the Chapter by the same date must have reached 24,000 acres.[7] The Conquest brought other changes in its train. Originally the bishop was head of the Chapter, and the canons his assistants. But, beginning not later than with Maurice, who held high office under the Crown, the bishops became more and more immersed in politics, and found no time to preside, while the Chapter would naturally raise no objection to greater independence. What our French neighbours now call a _doyen_, a senior from among the canons, took the bishop's vacant place, and became dean. John de Appleby, so late as 1364, dean by virtue of papal proviso, was only allowed to summon the Chapter, and could not preside until he had obtained a prebend by exchange. A hundred and fifty years later Colet was a prebendary. I find no traces of archdeacons--London, Essex, Middlesex, or Colchester--prior to the Conquest, but these eyes of the bishop soon appear afterwards; and the Chanter becomes Precentor; the Sacrist, or keeper of the plate, vestments, and other valuables, becomes Treasurer; and the Master of the Schools, Chancellor. For the sake of convenience looking forward a little, these changes, begun in Norman times, were completed not long after.