ANSWER
Yes it is true but I did keep sort of a record for our own purposes for future references because that was the first occasion that knock-out drops were supplied to us and we made use of it.   It was important for us to know if we might go into a neighbouring country and want to abduct someone like General how many drops to administer, what the reaction would be and how long before we could move in and in what way would, what reaction it would evoke from the victim.