Linear MBTA by David | Oct 19, 2008 | photo, transportation | 0 comments Mysterious marks on a red line seat cushion. A new form of tagging? A Rosetta Seat? Bad upholstery adhesive? Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.