claim: The Tenth Doctor spends time traveling alone.
evidence: Carl Kellner -LRB- 1 September 1851 -- June 7 , 1905 -RRB- was a chemist , inventor , and industrialist .. He made significant improvements to the sulfite process and was co-inventor of the Castner-Kellner process .. sulfite process. sulfite process. Castner-Kellner process. Castner-Kellner process. He was a student of Freemasonry , Rosicrucianism , and Eastern mysticism .. Freemasonry. Freemasonry. Rosicrucianism. Rosicrucianism. mysticism. mysticism. He was the putative founder of Ordo Templi Orientis .. Ordo Templi Orientis. Ordo Templi Orientis