It is a well-established ethical principle that, in general, a lawyer who represents a client in a litigated matter may not also appear as a witness in the same matter, whether for or against the client. In a letter opinion in In re Straight Path Communications Shareholder Litigation, C.A. No. 2017-0486-SG (Del. Ch. July 12, 2021), Vice Chancellor Sam Glasscock offered guidance to the parties facing just such a prospect.