Hi Steve,
According to Noffsinger's bibliography:
"Illingworth, Arthur E.,
A History of 24 Squadron, Sometime of the Royal Flying Corps and Later of the Royal Air Force, appendices compiled by Major V A H Robeson MC, with a foreword by Air Marshal Sir H M Trenchard; London: The Aeroplane and General Publishing Co. (1920)," "Of this edition, specially bound, 275 copies have been printed by Messrs. Carling & Hales, Limited, at their works at Hitchin, in the County of Hertfordshire, and published by the "Aeroplane" and General Publishing Co. Limited for private circulation among the officers of 24 Squadron."
That's all Noffsinger says.
You may be interested to know that this book has recently been re-published in a softbound facsimile by The Naval & Military Press Ltd, in association with the IWM. I possess a copy and it's very nice indeed. Check out:
www.naval-military-press.com
Hope that helps.
Greg