cover PORT ARTHUR: 1898 long GB ½d. stationery envelope from London to "Chief Torpedo Instructor, Port Arthur, c/o Customs Chefoo" showing Russian P.O. Chefoo c.d.s. (Type 2) and Cyrillic "Port Arthur" h.s. in red on front and Chefoo dollar chop in blue on reverse; slight creasing and minor peripheral faults. Unusual item of incoming mail