On page 16, change Milk street to Milk Street in the clause "and bore down upon Milk street." This matches the spelling of two other references to Milk Street in the Sketches.
Even today, the Koh-i-noor diamond mentioned on page 16 is considered the most valuable diamond in the world.
On page 21, change Perewinkle to Periwinkle in the clause "Nurse Perewinkle does exist."
On page 27, the Baltimore riot of April 19, 1861 was a civil conflict between Confederate sympathizers against members of out-of-state militia (primarily Massachusetts and some Pennsylvania men). The incident is called "The First Bloodshed of the Civil War."
On page 34 transcribe door-ways with the hyphen, because the hyphen is found in door-step, door-handles, and door-mat.
On page 42 add period after comfortable in the clause: "was immensely cheering and comfortable."
On page 54, remove period after My in "My. Ganymede departed."
On page 61, add comma after moment in the sentence: He seemed a little startled at first, pondered over the fateful fact a moment then shook his head, with a glance at the broad chest and muscular limbs stretched out before him:
On page 75, Henry Wilson was the Senator from Massachusetts from 1855-1873.
On page 75, Preston Brooks beat Massachusetts senator Charles Sumner with a cane on March 22, 1856, in retribution for an anti-Kansas speech by Sumner that attacked Andrew Butler, a relative of Brooks.