WMF Petrie may have been the first traditional egyptologist to put forth the view publicly.
Since then there have been a number of journal articles on the petroglyphs and pottery in Eastern Desert wadis,
between the Red Sea and Nile River valley .
Thor Heyerdahl also made a proof-of-concept voyage in the 1970s.
Surprised with your many postings here, that this is the first you heard it ?