For a better look I scanned the area with my field glasses and that's when I realized the creature was a Tibetan blue bear, standing upright in search of food in a hollowed out tree.
I rapped my Sherpa on the head with my walking stick and said in broken Nepalese(नेपाली), "That's a bear, you swarthy oaf!" After looking through my field glasses he confirmed his assessment and asserted, "Yeti! Yeti." He then gently removed my pith helmet and conked me on the head with my own walking stick.
As it turns out "Yeti" is actually a corruption of the word "myeti", a regional dialect term for "bear".
Ethnic Tibetans fear and worship the bear as a supernatural being. Could it be that all this time the Yeti has been nothing more than a case of mistaken identity?