I just happened to read your message, and although it was written a while back, I'm hoping that you are still out there. I am also researching my Powles/Powless arboriginal family tree. My great grandfather, David John Powless, was full blooded Mohawk Indian. He lived on the First Nations, Bay of Quinte Tyendinaga Reservation. What I found so curious about your letter, is that my great grandmother, Rose Hannah (nee: Hawkins)Powless, also lived in Hallimand, Ontario, like your g-grandmother! (but she did so before marrying my G-grandfather). After doing some research, I discovered that in the early 1900's, the Tyendinaga Rez. was partially in Hallimand County. You didn't mention your great grandmothers name. Maybe we could help each other out?