Gain the Main Divide at Bernard Col or one of the options further north (crux – technical grade 4). Then follow north along rotten rock on the Main Divide (much nicer with plenty of snow). It’s also possible to drop down to the west and climb the north west ridge. The technical grade is from Bernard Col.
Via the Bannie Glacier and Christopher Col, then south over and around several rotten rock towers on the Main Divide.
The first ascentionists then traversed Mt Burns and descended to the Spence Glacier via the Poet Glacier.