On 18 September Vincent told Theo about receiving a letter from Bernard (
see letters 682 and
683). Those letters, however, give no indication that he had already replied, which increases the likelihood that this one had not yet been written. He did tell Theo about his reply in
letter 687 of 25 September. There are no further clues to help us pinpoint the date more accurately, so we have dated the present letter between Wednesday, 19 and Tuesday 25 September 1888.