Boswelian or Boswellian: How To spell?
The word Boswelian is misspelled against Boswellian, an adjective meaning "Relating to, or characteristic of, Boswell, the biographer of Dr. Johnson."
Boswellian has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings boswe & ian which should not be misspelled with single 'L'
Wrong Spelling:  boswe-l-ian  Correct Spelling:  boswe-ll-ian 
Find more incorrect spellings of Boswellian to spell right way.