In action against railroad for services rendered in negotiating leases and in surrendering, plaintiff's own evidence as to alleged loss of profits from plaintiff's retail grocery business, etc., held inadmissible. Wash. B. & A. Elec. B. v. Moss, 100 A. 86, 130 Md. 198. Plaintiff's own evidence as to the value of advantage of property to road was inadmissible. Id.