Doctor Mowray was an archaeologist in the 2360s.
In 2369, Mowray led an archaeological site on Landris II. That year, Captain Picard wished to contact him, but was informed by Data that he could not, as USS Enterprise-D's Stellar cartography wished to do an experiment which required a communications blackout for the next three hours and twenty two minutes. (TNG: "Lessons")
This character was only mentioned in dialogue.