1917 (Oct 15) Plain envelope to Holland from Paul Donnet, Bromley, Kent bearing GV pair 1d & single ½d & with Opened By /Censor /4850 label (CCSG Type 5) + black on blue Arms /Retuned to the Sender /By the Censor label imprinted (1384.) Wt. W6840/65. 1,000m. 9/16. P.P. Ltd. Est. 400 (CCSG 32 A) with blue crayon 225 tied black framed Undelivered for Reason Stated / Return to Sender & with black on brown M. – No 3/Please Return the Cover of this Letter for the Purpose of an Official Inquiry. Postmaster of Bromley Kent 24 Oct 1917 with imprint  28233/137 35m 11/14 G & S 8071 336 label & on reverse Bromley /Kent (29 Oct) arrival cds ……………..
………………….A very interesting item of Returned Mail subjected to an Official inquiry