Knowles had a great interest in military history, and wrote a number of books on the life of Napoleon. In 1912 he made a bequest to his alma mater, Trinity College. This established the Lees Knowles Lectureship, an annual series of talks on military science given by distinguished military and naval figures.
He held a commission as an officer in the Volunteer Force and its successor the Territorial Force, reaching the rank of lieutenant-colonel. After a stint as Honorary Colonel of the 3rd (Volunteer) battalion of the Lancashire Fusiliers, he was on 14 May 1902 appointed lieutenant-colonel in command of the battalion.[9] At various times he commanded the 3rd, 7th and 8th battalions of the Lancashire Fusiliers. He subsequently became the vice-chairman of the Lancashire Territorial Army Association.
Coat of arms of Arms of Sir Lees Knowles, Baronet of Westwood and Turton Tower
Crest
In front of a ram's head, couped, argent, armed or, three roses fessewise as in the arms.
Escutcheon
Gules, on a chevron cotised, between in chief two crescents and in base a cross-crosslet all argent, three roses of the field barbed and seeded proper.[1]
Motto
Nec diu nec frustra ("Neither for long nor in vain")[12]
Symbolism
The escutcheon and crest incorporates elements of previous arms used by the Knowles/Knolles/Knollys family.[13][14] The canton of the baronet at the top left is the Red Hand of Ulster, sinister.