Missing affidavits

In his interview of Amanda Charnley on April 26, 1978, Mike Collier asked the following question:

Slumach’s daughter said at the trial, “I, Annie,an Indian woman of Cowichan in the Province of British Columbia make oath and say that I am a daughter
of the above named Slumach, that I arrived in this city on the 5th instant and have since been endeavoring to procure the attendance at this court of one Moody an Indian and one Florence Reed to give evidence on the trial of the said Slumach of the above charge, that I have not been able to procure the attendance at this court of the said Moody or said Florence Reed.”

In Justice Drakes records of the Assizes of 15 November is noted: "The affidavits of Slumach and his daughter Slumach were produced and read." It seems the affidavits did survive--but where are they?