My Merckx was abandoned at Temple University and left outside for months. Luckily for it, and me, the grounds manager there was a cycling enthusiast. It stayed with the police for 3 months as abandoned before the grounds manager owned it.

I don't see how this ends up yours unless you cut a deal with whoever manages abandoned property with the school. I would leave a card under the saddle or taped to the bike offering to buy it. A lot of kids are getting dad's old bike in the garage and they just don't know. Whoever had the Merckx used Shimano cables in Campy Ergo levers...which is why it was probably abandoned.