The quarrel was eventually settled by compromise. The Pope was to
invest the bishop with ring and crosier, or pastoral staff of office,
as emblems of the spiritual power; the King, on the other hand, was to
grant the lands from which he bishop drew his revenues, and in return
was to receive his homage or oath of allegiance.

This acknowledgement of royal authority by the Church was of great
importance, since it gave the King power as feudal lord to demand from
each bishop his quota of fully equipped knights or cavalry soldiers
(SS150, 152). This armed force would usually be commanded by the
bishop in person (S140).

137. Henry's Quarrel with Robert; the "Lion of Justice."

While this Church question was in dispute, Henry had still more
pressing matters to attend to. His elder brother Robert (SS124, 127)
had invaded England and demanded the crown. The greater part of the
Norman nobles supported this claim, but the English people held to
Henry. Finally, in consideration of a heavy money payment, Robert
agreed to return to Normandy and leave his brother in full possession
of the realm. On his departure, Henry resolved to drive out the
prominent nobles who had aided Robert. Of these, the Earl of
Shrewsbury, called "Robert the Devil," was the leader. With the aid
of the English, who hated him for his cruelty, the earl was at last
compelled to leave the country.

He fled to Normandy, and, in violation of a previous agreement, was
received by Henry's brother Robert. Upon that, Henry declared war,
and, crossing the Channel, fought (1106) the battle of Tinchebrai,[1]