He was called Sol-leks, which means the Angry One.

Like Dave, he asked nothing, gave nothing, expected nothing; and when he marched slowly and deliberately into their midst, even Spitz left him alone.

He had one peculiarity which Buck was unlucky enough to discover.

He did not like to be approached on his blind side.
Of this offence Buck was unwittingly guilty, and the first knowledge he had of his indiscretion was when Sol-leks whirled upon him and slashed his shoulder to the bone for three inches up and down.

Forever after Buck avoided his blind side, and to the last of their comradeship had no more trouble.