[ Complete silence would indeed unnerve Sherlock. The dampened sounds are enough for him. The complaining locals will likely be mollified enough. ]

At first, as I did him. We did not look like each other's brother nor sound like them. The most damning evidence for each of us to be who we said to be were all the inconsistencies we could point out. No purposeful impersonator would get so much wrong yet hold onto their identity so fiercely. It was highly illogical.