Archival records of the Department of Indian and Northern Affairs' Black Series (west of the border) and Red Series (East of the Manitoba-Ontario border) are a part of Library and Archives Canada Record Group 10. Included in these primary sources are files, letters, and correspondence related to administration for headquarters and the field offices.
Parts of the Library and Archives Canada collection have been digitized and may be searched and accessed online for free.
For information about RG10, see Indian Affairs Record Group 10 (RG10) Inventory
Suggestions for searching
1) Enter your key words - for example a personal name, an agency name, a band name, or a particular type of information (letter, treaty, etc.). It is not necessary to change the drop down box options - you may simply leave the setting at Any Keyword.
And then, if you wish...
2) You may limit results to items from the RG10 collection if you enter RG10 and select the option Archival Ref. Number in the drop down box. Be aware that information on your topic may be present in other RG collections, such as RG15 - the Department of Interior. ("As the primary agency responsible for the administration and development of all federal lands and natural resources in the former North-West Territories, the Department of the Interior played a significant role in the formation of federal scrip policy; in the creation and management of the scrip commissions; and in the administration of each commission's decisions concerning the awards given to individual Métis families. Given its mandate, it is only natural then that the majority of scrip commission records held by the National Archives should be found in the record group established for the Department of the Interior." For information on Metis Scrip Records in RG15, see here.)
Brandon University Library has a collection of microfilm titled Archival records RG10 from the Dept. of Indian Affairs - housed in the catalogued microfilm collection on the Main Floor of the Robbins Library - E78.C2P81. This collection is not complete. The Library has the following reels:
Volumes 3555-4095, reels C9639-9640, C10098-10187, C10190-10192, C10194-10198, C10203-10204, C11063 (index).
Volumes 6001-6491, reels C7908-7963, C8134-8219, C8639-8803, C9801-9811, C9641-9642 (indexes).
Volumes 999A-1728 (incomplete), reels C13900-13903, C13913-13936, C14250-14273, C14275, C14278-14280, C14297, C14838, C14865, C14866, T1455-1459, T1461, T1462, T1464, T1465, T1467-1476.
Volumes 1078-1133, reels C7208-7723, C8626-8636, C 9000-9009.