After spending the whole morning together, Zhang Heng knew that Mr. Villard was indeed, if not, Sherlock's biggest fan.
His words and the way he looked at Holmes confirmed his thoughts about him.
On the other hand, although Sherlock Holmes said nothing about the flattery, he secretly enjoyed such admiration towards him. No matter how lonely and noble artists were, they truly wished deep inside their hearts and minds that the world would accept their works. Based on how one defined an artist, Holmes couldn't be considered one, though, his attainments in the criminal investigation did earn him a Victorian artist title.
Of course, Holmes would pay more attention to the case that Villard told about rather than the compliments. Holmes appeared to be extremely interested in this 'gentleman thief.'
In the carriage, he asked Villard, "How much information do you have about him now?"