A Testator / Testatrix who writes something that purports to revoke a Will, with an intention to revoke a Will, and executed in accordance with provincial legislation (e.g. signed in front of 2 appropriate witnesses, etc.) will also revoke a Will. (dynamiclegalforms.com)
The testatrix was a resident of Ontario. (moneysense.ca)
Last Wills and Testaments (this can be overcome if it is shown that it was destroyed without an intent to revoke the Will, e.g., in a house fire that also killed the testator or testatrix). (law.stackexchange.com)