What was the gauge of the Towson and Cockeysville Electric?

The 1920 McGraw Electric Railway Directory, which lists the gauges of almost all listed railways, doesn't show it for the T&C. Was this standard gauge, or 5-4.5 to match the United Railways to which it connected at Towson?

I believe it was standard. It had no track connection with the UR&E in Towson. Presumably, however, there was a connection with the Northern Central at Timonium.

It's not mentioned at Timonium in the Pennsy's CT1000 from 1923, and http://rnetzlof.pennsyrr.com/corphist/prr6.html (1918) doesn't list it. Is it possible to determine the gauge from this photo of tracklaying or this photo?

I'll still hold out for standard, although I can't prove it. During a repaving project a couple of years ago at Chesapeake & Washington, near the Courthouse, a rail on the T&C curve from Chesapeake into Washington was exposed, and there was clearly no connection with the city line. The UR&E turned east from Washington onto Chesapeake, the T&C turned south onto Washington from Chesapeake, and the twain didn't touch. As you probably know, the T&C had an off-street terminal on the east side of Washington where the later Jeffersonian Building now stands. In any event, there was no reason to adopt the UR&E gauge since the T&C didn't connect and never had any intention of running through on the UR&E. I vaguely recall that the PRR helped a bit to support this outfit, since, erratic as it was, it was the Pennsy's link to the county seat. You might try tracking down publications of the carbuilder, which I think was Edison-Beach.