I went back to look for DB tonight, but he is nowhere to be found. And it'll be a lot harder to find him for the next few days for a Chinese funeral procession is being held near his usual spot.
I walked the same four blocks looking for DB. And then my Dad very kindly drove me slowly in and out of the carparks and little roads just so I could cover a wider radius.
I've asked the coffeeshop lady to help me keep a lookout for DB. It's very worrying not knowing how or where he has disappeared to. I hope he'll turn up soon.