In the fall of 2022, on behalf of Alberta Parks, a Historical Resources Impact Mitigation of two archaeological sites (GfOx-59 and GfOx-61) was conducted on the Big Island of Sir Winston Churchill Provincial Park in Lac La Biche Alberta. These sites contained two different ceramic assemblages, with GfOx-59 producing Narrows Fabric Impressed Ware, first identified in the Buffalo Narrows region of Northwestern Saskatchewan, and the ceramic ware most common in the region. While GfOx-61 produced Avery Horizontal Corded Ware, first identified in southeastern Manitoba, and never before observed in northeastern Alberta. Both wares are discussed and their distributions across western Canada examined. It is posited that with the newly confirmed presence of Avery Corded ware within northeastern Alberta, past ceramic sherd identifications may have combined the relatively similar morphology of body sherds due to a superficial or untrained inspection, and that some previously collected assemblages could potentially contain unrecognized Avery Horizontal Corded Ware. If confirmed the presence of this ware across the region could then indicate a previously undiscovered cultural expression in the region, or a long distance trade and influence network stretching from southeastern Manitoba to northeastern Alberta.