Arthur wrote to his sister Margaret on 17 July 1906, "on Saturday we go to Cudlow House, Rustington." On 6 September, he wrote to her, "We are just at the end of our stay here, having failed to get an extra week for which we asked, and have succumbed to an invitation to go to Scotland with Jimmy [Barrie] for the close of the holidays." So there you have it: Saturday, July 21st 1906 until Friday, September 7th.