You can read this book here in pdf - Electric Scotland

FROM ENGLISH CHRONICLERS 257
1174
BENEDICT OF PETERBOROUGH, GESTA HENRICI II, VOL. I,
pp. 79-80. *
Meanwhile Utred and Gilbert, Fergus' sons, were at strife
as to which of them should be lord of the other and have
dominion over the Galwegians and had ;
great hatred between
them, so that each of them lay in wait for the other to slay him.
And in process of time Gilbert, Fergus' son, collected his
men and made a ;
plan with them that his brother Utred should
be taken and slain. And at the appointed time they came
together to take and slay him.
And Malcolm, son of Gilbert Fergus' son, came and
besieged the island of - - in which abode Utred, brother of his
father, and cousin of Henry, king of England, son of Matilda the
empress ; and captured him, 2 and sent his butchers, commanding
them to put out his eyes, and to emasculate him and cut out
his tongue and so it ; was done. And they went away, leaving
him half-dead and ; shortly after he ended his life.
And while these things took place the lord king sent to
England one of his priests, Roger of Hoveden by name, to
Robert de Vaux, that they two should meet Utred and Gilbert,
Fergus' sons, and draw them to [Henry's] service.
And when about the feast of St. Clement 3
they had come
to a conference between themselves and Gilbert, Fergus' son,
Gilbert himself and the rest of the Galwegians offered them for
the king's benefit two thousand marks of silver, and five hundred
cows and five hundred swine in revenue each year on this
1 Cf. Hoved., ii, 69 ; a very short account. (Hoved., ii, 299, in error
attributes the crime to Gilbert's son Duncan.)
"
Cf. W. of N., in Chr. of Ste., etc., i, 186- 187 : There were also in that
army two brothers, Gilbert namely and Utred, lords of the province of Galloway,
with a numerous band of their own nation. These were the sons of
Fergus, former prince of the same province, and had succeeded their father
when he yielded to fate the ; king of Scotland (who is sovereign lord of that
land) dividing the heritage between them.
"
But Gilbert, the elder, grieved that he had been defrauded of the
entirety of his father's right, and ever hated his brother in his heart, although
fear of the king restrained an outburst of the wrath he had conceived. But
when the king was taken he was freed from this fear, and presently laid his
hands upon his brother, who anticipated no evil ; and slew him, not by a
simple death, but racked by tortures to satiate his execrable hatred. Immediately
he invaded his brother's territories, barbarians raging against
barbarians, and caused no small slaughter of men.
" Now his brother, thus basely slain, had a son called Roland, an active
and vigorous youth, who with help of his father's friends opposed his savage
uncle with all his strength."
2 "
Treacherously," Hoved., ii, 69.
3
23rd November.