Francis Blomefield,
History of Norfolk — Chapter 6
“ The Essay on the Antiquity of the Castle, p. 21, says, that Roger Bigot had the custody of it committed to him; and quotes the Baronage, fo. 132, for this purpose; but there we find nothing of its being committed to his custody, but on the contrary, that "adhering to those great men, who put themselves in arms against the King, he fortified the castle of Norwich, on the behalf of Robert Curthose, and wasted the country thereabouts." ”
