Someone is Riding the T on My Dime

I lost my August subway pass somewhere between Kendall and my house during the Friday rush-hour/deluge (though suprisingly it looked like it did not rain at all in Somerville -- proof that it's just better on that side of the river). It's a terrible feeling, though, having pretty much lost $44. My only hope is to find someone on Craigslist that wants to get rid of their pass for some reason at a reasonable price.