▁also ▁developed ▁secret ▁sab ot age ▁and ▁sub ter f uge ▁devices ▁for ▁M I - 9 . ▁ ▁Operation ▁Min c eme at ▁F ras er ▁was ▁also ▁involved ▁in ▁the ▁intelligence ▁operation ▁c oden amed ▁Operation ▁Min c eme at , ▁which ▁was ▁designed ▁to ▁drop ▁a ▁body , ▁carrying ▁false ▁papers ▁to ▁mis le ad ▁the ▁Naz is , ▁off ▁the ▁Spanish ▁coast . ▁He ▁was ▁task ed ▁with ▁design ing ▁a ▁tr unk , ▁ 6 ' ▁ 2 " ▁long ▁and ▁ 3 ' ▁wide , ▁to ▁carry ▁a ▁" de ad weight " ▁of ▁ 2 0 0   lb ▁that ▁would ▁be ▁preserved ▁in ▁dry ▁ice . ▁When ▁the ▁dry ▁ice ▁ev apor ated , ▁it ▁filled ▁the ▁can ister ▁with ▁carbon ▁dio x ide ▁and ▁drove ▁out ▁any ▁o xygen , ▁thus ▁pres erving ▁the ▁body ▁without ▁re fr iger ation . ▁The ▁plot ▁was ▁the ▁basis ▁of ▁the ▁book ▁( and ▁later ▁film ) ▁The ▁Man ▁Who ▁Never ▁Was . ▁ ▁Later ▁life ▁ ▁After ▁the ▁war , ▁F ras er - Smith ▁bought ▁a ▁rund own ▁da iry ▁farm ▁in ▁Br at ton ▁F lem ing , ▁in ▁south west ▁England . ▁ ▁It ▁became ▁a ▁prof itable ▁business . ▁ ▁In ▁the ▁late ▁ 1 9 7 0 s , ▁his ▁family ▁persu aded ▁him ▁to ▁seek ▁permission ▁to ▁write ▁a ▁book ▁about ▁his ▁w art ime ▁explo its . ▁ ▁With ▁clear ance ▁under ▁the ▁Official ▁Sec rets ▁Act ▁he ▁wrote