cover 1901 (17 May) ½a. stationery envelope to Tongku and redirected to Tientsin and cancellled with "BASE OFFICE/DEP" c.d.s., and 1901 (19 May) envelope to Tientsin with 3p. pair cancelled by "BASE OFFICE" c.d.s.; each additionally bearing B.R.A. 5c. on ½c. with violet handstamp