Protean

Proteus was known for his ability to escape by changing his shape or appearance. It's a handy skill to have when you need it. On the other hand being Protean to conceal your lack of conviction can brand you as shallow. 

Capitol

John was a con man. He reveled in the description. He claimed that he did nothing illegal

Train yard

The building was an ancient mill building overlooking the Boston and Maine railroad tracks in Charlestown.