Sentence:  Courage and coolness are great qualities in a <WSD>gillie</WSD>, and you do not really know your man till you have been with him in a storm. ... Most <WSD>gillies</WSD> have cool heads and hearts of oak. They must have these qualities; to be cool and courageous is part of their job. 
Meaning of the word marked with <WSD> tags:  A fishing and hunting guide; a man or boy who attends to a person who is fishing or hunting, especially in Scotland.