Chapter 510: Muzzle-loading Flintlock Fire Gun!

Standing in Rotten Pine Alley, Richard felt the eerie atmosphere, turned his head to look around, and then stepped towards the courtyard at the far end of the alley.

When he reached the gate of the courtyard, he stopped, confirming that this was the address of the "old friend" Sherlock had mentioned, and reached out to knock on the door.

"Bang, bang, bang!"

The sound of knocking arose, but there was no response from inside.

"Hmm?" Richard's eyebrows furrowed slightly, and the next moment he knocked on the door again.

"Bang, bang, bang!"

Still, there was no movement inside.

On the third knock, Richard called out, "Excuse me... Is anyone there?"

There was still no movement inside, silent as a graveyard.

This—

Richard's eyebrows deepened in a frown, and the next moment he placed his hand on the courtyard door and tentatively pushed it. With a "squeak," somewhat surprisingly, the door opened easily.