1885 Cover from G.B, bearing two 1885 5d green stamps each tied by AIGBURTH LIVERPOOL DE 4 1885 squared circles (earliest recorded date of use). Addressed to Captain H.M. Sandback R.A, Bareilly, India redirected to Umballa and then to H. FORCE , backstamps include THE VERY RARE FIELD P.O No. 5 c.d.s. This F.P.O used at the Camp of Exercise held near DELHI in December 1885 - January 1886; PROUD (Nr. DP2 page 386) ONLY RECORDED A SINGLE EXAMPLE OF THIS VERY RARE F.P.O. Opening faults at top otherwise fine.