enveloped to Tongku, bearing B.R.A. ½c. cancelled with circular "RAILWAY POST OFFICE/TIENTSIN" in violet, in combination with India 1900 3p. pair each cancelled by F.P.O. 4 "bridge" type c.d.s. and with F.P.O. single-ring arrival c.d.s. on reverse " /> <I> "Captain Twining"</I> enveloped to Tongku, bearing B.R.A. ½c. cancelled with circular "RAILWAY POST OFFICE/TIENTSIN" in violet, in combination with India 1900 3p. pair each cancelled by F.P.O. 4 "bridge" type c.d.s. and with F.P.O. single-ring arrival c.d.s. on reverse | Christie's