Referring to Ptolemy Pass, the authors of the Interprovincial Boundary Survey Report wrote, "The name is due to the mountain which dominates the pass on the east side. Seen from the west, the summit ridge bears a very striking resemblance to a recumbent Pharaoh (see illustration) and it has for many years been spoken of as Mummy Mountain. The name ''Mummy'' is not suitable for the pass and there are Pharaoh Peaks elsewhere, so the commissioners have suggested the name ''Mount Ptolemy'' and have applied it to the pass."