It seems that their father didn't take to their joining the war effort too well. On 3rd October 1914, The Slough, Eton and Windsor Observer reported -
"Maidenhead. Attempted Suicide
Worried about His Son At The Front.
Lying face downwards with a razor in his right hand and three gashes in his neck, a man named Charles Stevens was discovered in a semi-conscious condition on the common at Pinkney's Green. For reasons which at present are unknown he had attempt to take his life, but the wounds were not sufficiently severe to serve his purpose, and he is now at the Maidenhead Cottage Hospital making rapid progress towards recovery. When he is in a fit condition he will be brought before the magistrates to answer for his foolish action. The man is 44 years of age and is in lodgings at Pinkney's Green. He is employed at Cooper's Brick Kiln. It is thought that among other things he has been worrying about his son at the front."
Frederick was wounded in battle and sent to The General Hospital in Nottingham. From his hospital ward Frederick penned a letter home. The Reading Mercury reported on 9th January 1915 -
"Maidenhead Man Wounded - The following is an extract from a letter sent by Private F. Stevens of the 1st Battalion Royal Berkshire Regiment (son of Mr. C. Stevens, 5, Dolman's-buildings, Maidenhead) who was badly wounded at the front, and is now in the General Hospital at Nottingham: 'My upper jaw has been broken and my left eye is useless. I have been in this hospital since November 22, and I am progressing as well as can be expected. The hospital authorities cared for us very well this Christmas and I enjoyed myself very well under the circumstances. The people od Nottingham are very good indeed to all the wounded here.'
"Acting Lance-Sergt Charles Stevens of the Royal Berks Regiment, eldest son of Mr. and Mrs. Charles Stevens of 5, Dolman's Buildings, King Street, Maidenhead, was killed on November 29th. He had distinguished himself for bravery in the field in the earlier part of the war, and was the possessor both of the D.C.M. and the Military Medal."