Conversation so far:
How did the critic Robert Hughes get started in his career?
The critic Robert Hughes, an aspiring artist and poet, abandoned his university endeavours to become first a cartoonist and then an art critic for the Sydney periodical The Observer.
What did the critic Robert Hughes do after working as an art critic for The Observer?
The critic Robert Hughes settled in London in 1965 and wrote for The Spectator, The Daily Telegraph, The Times, and The Observer, and contributed to the London version of Oz.

Question: How long did he work for Time?
Self-contained rewrite: How long did the critic Robert Hughes work for Time magazine?