[3] In 1898 he married the actress Marie Tempest, and although he continued his acting career for some years after that – he appeared with Seymour Hicks in Self and Lady (1900),[8] and with Charles Wyndham in The Case of Rebellious Susan 1901)[9] – he turned mostly to writing, usually under his real name.
[12] At the Haymarket Theatre in December 1905 Gordon-Lennox, acting under his real name, was in the cast of The Indecision of Mr Kingsbury, which he adapted from Georges Berr's L'Irresolu.
[14] The Van Dyck (His Majesty's, March 1907), from the French of Eugène Fourrier gave Sir Herbert Tree one of his favourite short parts, but ran for only 32 performances.
[3][16] Another adaptation from the French, Angela (1907), had a starry cast including Tempest, Allan Aynesworth, Eric Lewis, Lillah McCarthy and Lydia Bilbrook, but had only a moderate run of 75 performances.
[17] Gordon-Lennox's last plays included Her Sister (1907), co-written with Clyde Fitch, seen on Broadway, starring Ethel Barrymore,[18] and Helena's Path written jointly with Anthony Hope, (Duke of York's, May 1910).