In the Griffiths Valuations of Ballynacally and Cornfield (ca. 1855) you will find the landowner Major William Ball. In fact, if you look at that man's holdings in the Griffiths (see
http://www.clarelibrary.ie/eolas/coclar ... fithb1.htm ) you will see that he was a major landholder in the area.
If we then go to
http://www.clarelibrary.ie/eolas/coclar ... terest.htm we see that the Ball family resided at Fort Fergus. In the reference given to you by Mike you will see that the Balls owned over 3,000 acres so they must have had a lot of game to keep.On the same page (Ballynacally - Places of Interest) you will see the names of other "significant" families which could have employed a gamekeeper, if not several. So that gives you some strong leads. For example, with those names you could go looking for estate papers which would list employees. I suspect that you are a short step away from finding the name of Patrick Delaney's employer.
Regarding your question about the life of a gamekeeper, the position of gamekeeper has always been somewhat risky, particularly during the periods of agrarian upheaval which plagued County Clare. The gamekeeper would have to defend his master's game from a starving population which would often poach to survive and not hesitate to use violence in the process. His situation would have been similar to that of cowherds who might be threatened with murder or worse if they continued to work for their large-landowner employers. The Clare Library has just published an excellent article on agrarian violence at
http://www.clarelibrary.ie/eolas/coclar ... y_alts.htm . See, for example, the fates of the Doyle brothers who were dragged from their beds at the dead of night by a party of men who beat them severely, dragged them naked outside and then cut off their tongues. It was stated that their only crime was to have taken jobs as drovers on the Westropp estate in the place of two men who had recently been dismissed for misconduct. A gamekeeper might have had the advantage of being armed as he went about his business. Nevertheless by virtue of his position he would have been at least a pariah among much of the local community. There were many periods in the 18th and 19th century when he would have had to watch his back if he walked down a lonely road.
Paddy