Essex & Suffolk Royal Garrison Artillery Territorial Force [and No. 1 Co.]
‘New head quarters for the Essex & Suffolk Royal Garrison Artillery Territorial Force [and No. 1 Co.] were erected near the Main road in 1911, and comprise adjutant’s office, armoury, orderly and recreation rooms, a drill hall 100 by 50 feet, miniature rifle range and quarters for the instructor. The Harwich Troop of A Squadron, Essex Yeomanry, also have an armoury and drill here.’ (Kelly, 1914)
Please also see Harwich.