that he would, with their advice, correct whatever he found there was
need to reform. Meanwhile the Poitevins brought into England fresh
swarms of hirelings from their own land, and Peter des Roches urged
Henry to crush rebellion in the bud. As a warning to greater offenders,
Gilbert Basset was deprived of a manor which he had held since the
reign of King John, and an attempt was made to lay violent hands upon
his brother-in-law, Richard Siward. The two barons resisted, whereupon
all their estates were transferred to Peter of Rivaux. Yet Richard
Marshal still continued to hope for peace, and, after the failure of
earlier councils, set off to attend another assembly fixed for August
1, at Westminster. On his way he learnt from his sister Isabella, the
wife of Richard of Cornwall, that Peter des Roches was laying a trap
for him. In high indignation he took horse for his Welsh estates, and
prepared for rebellion.

The king summoned the military tenants to appear with horses and arms
at Gloucester on the 14th. There Richard Marshal was declared a traitor
and an invasion of his estates was ordered. But the king had not
sufficient resources to carry out his threats, and October saw the
barons once more wrangling with Henry at Westminster, and claiming that
the marshal should be tried by his peers. Peter of Winchester declared
that there were no peers in England as there were in France, and that
in consequence the king had power to condemn any disloyal subject
through his justices. This daringly unconstitutional doctrine provoked
a renewed outcry. The bishops joined the secular magnates, and
threatened their colleague with excommunication. A formidable civil war
broke out. Siward and Basset harried the lands of the Poitevins, while
the marshal made a close alliance with Llewelyn of Wales. The king
still had formidable forces on his side. Richard of Cornwall was
persuaded by Bishop Peter to take up arms for his brother, and the two