There is no container at the posted coordinates. Rather, you will find information about the Arnott family who used to own this property.
Collect some simple numbers from the plaque at GZ to calculate the coordinates for the final which is a short walk away.
Take the year the Arnott brothers came from Ireland to Upper Canada and divide it by 1000. Add it to these meaningless north coords: N 43 35.311
Take the final year that the Arnott family lived in the house and owned this property and divide it by 1000. Add it to these meaningless west coords: W 079 43.885
Please bring a pen to sign the log.