Right at the end of the rogatory interview of Carol Tramner, Mrs Fenn's niece, we have this:
DC1485'Do you know if your aunt knew of anyone staying as a guest, or mentioned that someone was staying there'
CT'She probably knew, but she does not talk much about this.
DC1485'Yes.
CT'So this'humm.
DC1485'Yes.
CT'She knows some people from the Resident's Association but I cannot guarantee that she knew who was staying there. She is pretty reserved or at least tries to be, but she does know the majority of the members of the Resident's Association and when there is a meeting'for this reason perhaps she knew that an apartment would be occupied. Remembering this after so much time has passed'
DC1485'Yes.
CT'She is very astute, you know.
DC1485'Very good. Is there anything else you would like to add'
CT'No.
DC1485'She was given the opportunity to clarify. Right, it is 11h10. This interview has ended/
Disinclined to talk (even to relatives) and mentally astute ...
And there has to have been some reason for that question being put to Carol Tramner ...