This expression, and another in the last line of the XXVIIth Stanza, are
borrowed from a splendid passage of Mr. Burke’s, in which, speaking of
Lord Keppel, he says, ‘With what zeal and anxious affection I attended
him through his trial, _that agony of his glory_--with what prodigality
I _squandered_ myself in courting almost every sort of enmity for his
sake,’ &c. _Burke’s Works_, v. 8, p. 54.