Source: During research on his brother, Charles Martin Knack, where I found him referred to in news clippings
Family Search: When Lance Corporal Amiel Louis Knack was born on 2 June 1893, in Preston, Waterloo, Ontario, Canada, his father, Heinrich Johann Christian Knack, was 37 and his mother, Maria Sophia Gillow, was 38. He had at least 1 son and 1 daughter with Mary Morrow. He lived in Wellington, Ontario, Canada in 1901 and Waterloo, Ontario, Canada in 1911. He registered for military service in 1914. In 1939, his occupation is listed as caretaker, Preston Post Office in Preston, Waterloo, Ontario, Canada. He died on 31 January 1985, in Cambridge, Waterloo, Ontario, Canada, at the age of 91, and was buried in Cambridge, Waterloo, Ontario, Canada.
His brother, Private Charles Martin Knack, reg. no. 402121 also served with the 18th Battalion.
Lance-Corporal Amiel Lewis Knack, reg. no. 402120.
This man enlisted on 16 January 1915, along with his brother Charles Martin Knack, at Galt, Ontario.
He was a furniture maker/upholsterer with 1 year with the 29th Highland Light Infantry.
He arrived in England on 26 August 1915 and was taken on strength with the 9th Battalion effective that date. He served with this battalion and was AWL one day and was appointed as a lance-corporal on 13 November 1915.
On 19 January 1916, he was transferred to the 18th Battalion and arrived “in the field” the next day. He was taken on strength as a private.
He was wounded in the buttocks on 18 May 1916 and was sent to No. 5 Canadian Field Ambulance for treatment, being returned to the Battalion on 20 May 1916, after a visit to No. 17 Casualty Clearing Station on the 17th.
He was more seriously wounded on 2 October 1916, suffering a GSW to the left wrist, which resulted in an amputation of a finger due to the severity of the fracture. He was admitted to No. 7 Canadian General Hospital and was shipped to England for more treatment aboard the HS Lanfranc.
He attended several military hospitals in England from 27 October 1916 to 28 March 1917.
Private Knack was granted Permission to Marry on 23 April 1917, and his Assigned Pay shows it being directed to a Mrs. Minnie (nee Morrow) Knack living at 63 Bachelors Walk, Lisburn, Ireland. He assigned $15.00 of his pay to her per month.
He was transferred to the 4th Canadian Reserve Battalion on 18 May 1917.
He was medically boarded as “B”2 and was posted to the Western Ontario Regimental Depot for employment. He was returned to the 4th Canadian Reserve Battalion on 31 January 1918 and then was ordered to report to Headquarters on 17 February 1918. It was determined he was to be put “On Command” pending dispatch to Canada and he embarked for Canada from Liverpool in April 1918, arriving at London and Taken on Strength with Military District Depot 1 at London, Ontario.
He was discharged as medically unfit for further general service on 12 August 1918, at London, Ontario.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 