1889: Major Waddell's Yeti Prints (sources)
- Alone to Everest, by Earl Denman, 1954 Collins. Pg. 223
- PRIMARY SOURCE: Among the Himalayas, by Major Laurence Austine Waddell, 1899 Archibald Constable & Co., Westminster, London, England. Pg. 223-224. Online at: https://books.google.com/books?id=PueCAAAAIAAJ&pg=PA223&dq=%22some+large+footprints+in+the+snow+led+across+our+track%22&hl=en&sa=X&ei=KRRUVZKrCJepoQT464DoDQ&ved=0CDQQ6AEwAg#v=onepage&q=%22some%20large%20footprints%20in%20the%20snow%20led%20across%20our%20track%22&f=false
- "Science Closes in on 'Wild Man' of Everest," article in Popular Science, December 1957. Online at: https://books.google.com/books?id=PS0DAAAAMBAJ&pg=PA96&dq=%22science+closes+in+on+the%22&hl=en&sa=X&ei=fhRUVZXhFc3EogTZ-IDYCA&ved=0CB0Q6AEwAA#v=onepage&q=%22science%20closes%20in%20on%20the%22&f=false