correspondence (No. 49) to London, annotated "On Field Service FHM Burton 5B Fd Hospl B.F.F. No extra charge" showing, on reverse, a good strike of the rare "BURMESE FIELD/SUB P.O./NO 2" single-ring d.s., various charge and tax markings. A very rare Mongaung Expedition cover and the finest of the three that Burton sent (photocopies of the other two with lot) accompanied by an interesting letter. Photo " /> <I> "Burton"</I> correspondence (No. 49) to London, annotated<I> "On Field Service FHM Burton 5B F<V>d Hosp<V>l B.F.F. No extra charge"</I> showing, on reverse, a good strike of the rare "BURMESE FIELD/SUB P.O./N<V>O 2" single-ring d.s., various charge and tax markings. A very rare Mongaung Expedition cover and the finest of the three that Burton sent (photocopies of the other two with lot) accompanied by an interesting letter. Photo | Christie's