Probably not sent.

Farley, copying to Schoenman and Pottle, mentions that the air voucher from Air India was never used "... and therefore the question of payment to Air India would not seem to arise." C.A. Menon, of the Gandhi Peace Foundation, had written to BR and Schoenman in an attempt to recover additional airfare costs that were incurred by Schoenman and Pottle during their visit to Delhi. The letter is typed on BRPF letterhead.

Also present are various copies of the letter:

Document .179209, a one-page edited TLS. The letter is typed on BRPF letterhead.
Document .179210, a one-page edited TL(CAR).
Document .179211, a one-page TL(CAR).