In November 1914, a 15 year old Alfred Hitchcock joined W.T Henley Telegraph Works as a junior technician. According to McGilligan’s biography, Hitchcock moved to the advertising department in 1917…
His new job was more picture-oriented: designing, laying out, and pasting up the advertisments and brochures for Henley’s products.
The following are adverts for Henley’s that appeared in The Times newspaper in October and November 1917 — I wonder if the 18 year old Hitchcock might have been involved with them?