[1] In the early twentieth century, Cassio Road was used for athletics, cricket and football.

By 1920 spectator facilities included a pavilion and covered standing areas on the western touchline, and a covered terrace behind the northern end of the pitch.

When football was played at the ground, duckboards were used on the two sides left open for cricket.

The ground's highest League attendance was 13,000 for a local derby with Luton Town on 25 March 1921.

The last League game at Cassio Road was played on 29 April 1922, with Watford beating Gillingham 1–0 in front of 5,000 spectators.