Arthur on the Lamp

A thought occurred to me, today, and I'm curious to see if there's a Sheldonista out there who knows this, off-hand: What was the first strip that showed Arthur sitting on the lamp?

I'm kinda curious to see how long that's been going on. If no one knows, I may just use the varying archive search features and see if I can figure it out. But I'm guessing there's an Arthur fan out there who know this.