Marie Joseph Robillard is my 5 great aunt. Her brother, Charles Louis Robillard III, is my 5 great grandfather. I have just visited Illinois a month ago and went to Fort de Chartres. There is a wonderful book there called "The Village of Chartres in Colonial Illinois, 1720-1765." I copied many pages from that book about the Robillards including some info on Marie Joseph. A relative is making copies of these pages for herself, therefore I cannot immediately help you. However, upon returning home, I went to my library and lo and behold! the book is there. It is located at the East Bank Regional Library in Metairie, La. and at their West Bank facility. If you'd like, I will e-mail you what info I have as soon as I get my copies back. About Marie Joseph's brother, he was born 1746 in Fort De Chartres, Illinois Territory and was buried 5 July, 1790 in Pointe Coupee Parish, La. I have not updated or confirmed my info on him or anybody else due to time constraints and the huge amount of info I brought back. Sorry I'm so long winded, I'll try to shorten next time!