Lot 71485 – 1891 Envelope sent by missionary Robert Walker whilst based in Mengo, Uganda, via the French PO in Zanzibar to England

1891 Envelope sent by missionary Robert Walker whilst based in Mengo, Uganda (1891-92), endorsed « Boustead & Ridley i/c on acct », who were forwarding agents in Zanzibar who maintained a missionary mail service for the CMS missionaries in Uganda using runners along the old caravan (slave) route from Lake Victoria, posted at the French P.O. in Zanzibar with Peace & Commerce 25c (pulled corner perf.) tied by double circle ds, reverse with French paquebot octagonal ds and Great Yarmouth arrival, rare forerunner mail from Uganda and thought to be one of only two covers forwarded through the French P.O. at Zanzibar, ex DuBro (see fig. 5.6 on p.82 in his book « Zanzibar’s Postal History legacy »).