That evening, Wiggins returned to report that the Baker Street Irregulars had followed and observed Pearson for half a day, and that nothing worthy of note had been obtained. He had started work at the chemical plant as usual and didn't act strangely. Holmes wasn't in a hurry, so he asked the kids to continue to keep their eyes peeled on Pearson. As for Sherlock, he wanted to work on his research paper.
On the second morning, Wiggins arrived, furiously knocking on the door and startling Mrs. Hudson, baking bread in the kitchen at that time. The commotion woke Zhang Heng too, and when he stepped out of his room, he saw Sherlock Holmes laughing loudly as handed seven shillings to Wiggins.
"One for each, two for yourself. Go to Inspector Gregson, and tell him that Holmes wants him to come to 221B Baker Street," said Sherlock. As he looked up, he saw Zhang Heng coming down the stairs.
