[1] In the First World War, he served in the Royal Garrison Artillery, from 1915, and was promoted to Company Quartermaster Sergeant in 1916 until being discharged due to 'disability' in 1919.

[2] Ducat joined the ground staff at The Oval in 1906, and soon became a regular member of the Surrey county team, playing alongside Tom Hayward, Jack Hobbs and Ernest Hayes.

Standing 5'10" high, he was a powerful, forcing batsman, and made 52 centuries for Surrey, including 306 not out in 280 minutes against the Oxford University in 1919.

In 1921 it was said that he was one of the most dangerous batsmen in England that is not quite first class, but his defence was not sound enough to bring him consistent success against the best bowlers.

He made his Arsenal debut on 11 February 1905, in a 2–0 win against Blackburn Rovers, playing at centre forward.

Ducat's ability and success with England brought attention from bigger clubs than Arsenal, who were at the time going through a financial crisis.

Eventually, he was sold for £1,000 to England's most successful club Aston Villa in 1912, having played 188 matches and scored 21 goals for Arsenal.