Mademoiselle of Monte Carlo by William le Queux

On his way out of London, Hugh had made excuse and stopped the car at a post office in Putney, whence he sent an express note to Dorise, telling her his change of address. He though it wiser not to post it.

Hence it was on the morning following Louise's arrival at Shapley, he received a letter from Dorise, enclosing one she had received under cover for him. He had told Dorise to address him as "Mr. Carlton Symes."