Hi Jan...I looked in my Early Ontario Newspaper Transcriptions from The Frontenac Papers...The Kingston Chronical 1819-1826 and didn't find any marriages for Prentice. I did find a Daniel Prentis in Ontario People 1796-1803 living in Charlottenburg in the Eastern Distrist and a Richard Prentice with a U.E. after his name in Kingston in the Midland District. Unfortunately the book doesn't provide any other genealogical info .... you just know that they were there and were most likely Loyalists. Good luck....Lora