Quick "Six Feet Under" question: What happened to Arthur the intern?

Title says it all, really. I think I missed a few episodes here and there, and don’t remember what happened to Arthur.

Who wants to fill me in?

Best I can recall he and Ruth had a little disagreement, not long after George entered the picture, and he basically just wandered off. Surely there was more to it than that, but that’s all I can remember without looking through episode guides somewhere.

He was in the fantasy this past week when Ruth was blasting her former love interests, just long enough to take a load from her walking stick cum shotgun.

He took off after Ruth accused him of sending the packaged doodies.

… which were actually being sent by George’s estranged son.