Five negatives, three of a letter and two of PB in suit and bowtie

Strip of five negatives, three of a letter and two of PB in a suit and bowtie, B&W. The letter reads: "14 Sept 43 / Dear Kenny: Here are two photographs sent as requested and mentioned in my airgraph of early september 43. Both are recent. / (1) was taken without my knowledge by my secretary whilst I was at work writing on the flat roof of my house. / (2) was taken by m official photographer at a Government function as part of a group, from which it is cut out. / The photos Mother and you sent me of yourself still show naval uniform. Haven't you one with an airman's uniform? If so, I'd like to have it. Surely you don't go up in the air with those wide flapping trousers of a jolly jack tar! / Affectionately, Paul / FROM Dr. Paul Brunton / c/o Thos. Cook & Son Ltd. / Postbox 171, Madras, India"