Henderson’s city and business directories date back to 1885. The Regina office has a large collection of telephone directories back to 1905.
Many Saskatchewan directories up to and including 1900 are available on microfiche:
Pre-1900 Canadian Directories. Ottawa, Ontario: Canadian Institute for Historical Micro-reproductions, 1988. (On 4219 FHL fiche beginning with 6360453. These fiche do not circulate to Family History Centers.)