Hi Saluti, are you referring to the 1911 census for Toronto when they were residing on Dundas Street? If so, I do have this record. I opened it on Adobe with no trouble but it was difficult to read some of it. It looked to me also that the niece was born in Saskachewan (March 1904). It remains a mystery and there is not much online for Saskachewan. The name which was transcribed as Havel, and you think might be Isabel, is lilely Mabel. Walter, brother of William H. Haslam who is the head of household in 1911, had a daughter, and her name was given on Walter's Death Registration in 1932 (005028) as Mabelle Weeks (married to Ralph M. Weekes). This 1911 census also states that Walter was widowed, which means that Mabel's mother died sometime after her birth and before the 1911 census taking. I have no knowledge yet on who Walter married or who was Mabel's mother.