1979’s The Dancers of Arun is the second volume in Elizabeth A. Lynn’s Chronicles of Tornor.
Morven, Lord of Tornor, was obliged by custom to give his orphaned nephew Kerris a place within his household. Thanks to Kerris’ missing right arm, lopped off by a raider when Kerris was a child, that place can never be that of a proper warrior. But the otherwise useless young man does have a talent for letters. The Keep needs its scribes, even if it does not think much of them.
Orphan he may be, but Kerris is not utterly lacking in immediate family members. After years of silence, Kerris’ older brother Kel arrives to take Kerris south with him — that is, if that’s what Kerris would like. Having little to tie him to rustic Tornor, Kerris chooses to go south.