This stamp is on the west side of Virginia Street just south of the Eureka intersection. Unfortunately, it’s undated, which is true of all the George Leavens stamps I have found. There is another one further south on this side of Virginia, though it’s not as clear.
Unfortunately I don’t have anything new to say about George Leavens, but I’ll take this opportunity to point to my previous post about George Leavens because I learned a lot of interesting things about him. Last time I wasn’t quite sure what the word in the middle of the stamp was, but this stamp is quite crisp in that regard, so I have confirmed my guess that it says “MAKER.” It seems like an unusual but less awkward version of the “MFGR’S” that appears in Minnis & Ewer stamps. (It took me ages to notice that the “G” in that does not stand for anything!)