Conversation so far:
What is an example of a job Henry Irving held early in his career?
Irving became a clerk to a firm of East India merchants in London
What year did Henry Irving first start to act?
On 29 September 1856 he made his first appearance at Sunderland as Gaston, Duke of Orleans, in Bulwer Lytton's play, Richelieu
In what work did Henry Irving make his first acting appearance?
On 29 September 1856 he made his first appearance at Sunderland as Gaston, Duke of Orleans, in Bulwer Lytton's play, Richelieu
How was Henry Irving's performance in the play Richelieu?
When the inexperienced Irving got stage fright and was hissed off the stage the actor Samuel Johnson was among those who supported him with practical advice.

Question: What was the advice that Samuel Johnson gave Irving?
Self-contained rewrite: What was the advice that Samuel Johnson gave Irving?