[T]he Lord Brandoch Daha fared fore and aft on the gangway about and about, as a caged panther fareth when feeding time is long overdue. And at whiles he clapped hand to the hilt of his long and glittering sword and rattled it in the scabbard. At length, standing over against Gaslark, and eyeing him with a mocking glance, "O Gaslark," he said, "this that hath befallen breedeth in me a cruel perturbation which carries my spirits outwards, stirring up a tempest in my mind and preparing my body to melancholy, and madness itself. The cure of this is only fighting. Wherefore if thou love me, Gaslark, out with thy sword and ward thyself. Fight I must, or this passion will kill me quite out. 'Tis pity to draw upon my friend, but sith we be banned from fighting with our enemies, what choice remaineth?"
Gaslark laughed and seized him playfully by the arms, saying, "I will not fight with thee, how prettily soe'er thou ask it, Brandoch Daha, that savedst Goblinland from the Witches"...

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "[T]he Lord Brandoch Daha fared fore and aft on the gangway about and about, as a caged panther fareth when feeding time is long overdue. And at whiles he clapped hand to the hilt of his long and glittering sword and rattled it in the scabbard. At length, standing over against Gaslark, and eyeing him with a mocking glance, "O Gaslark," he said, "this that hath befallen breedeth in me a cruel perturbation which carries my spirits outwards, stirring up a tempest in my mind and preparing my body to melancholy, and madness itself. The cure of this is only fighting. Wherefore if thou love me, Gaslark, out with thy sword and ward thyself. Fight I must, or this passion will kill me quite out. 'Tis pity to draw upon my friend, but sith we be banned from fighting with our enemies, what choice remaineth?"
Gaslark laughed and seized him playfully by the arms, saying, "I will not fight with thee, how prettily soe'er thou ask it, Brandoch Daha, that savedst Goblinland from the Witches"..." in the context of "Chapter 5, "King Gorice's Sending"" to mean that wisdom is timeless.