Final answer:
It is inferred that Dupin or someone in his employ might have followed Baron Danglars from his hotel as part of an elaborate scheme described in the excerpts.
Step-by-step explanation:
The individual who followed Baron Danglars from his hotel is not explicitly mentioned in the provided excerpts. However, the texts suggest that the character Dupin, known for his cunning and strategy, is involved in elaborate schemes surrounding various individuals, including Danglars.
The mentioned events, such as the disturbance caused by a man with a musket, were orchestrated by Dupin as a distraction to achieve his ends, which indicates that he, directly or through his agents, paid close attention to Danglars' actions and movements.
Therefore, it can be inferred that Dupin or someone in his employ might have followed Baron Danglars from his hotel to ensure the success of his plan. From the provided information, it is not explicitly stated who followed Baron Danglars from his hotel.
However, there are mentions of characters such as D-, Monsieur G-, and the Pochang who are involved in different events and incidents in the passages. These characters may have a connection to Baron Danglars, but without further context, it is unclear who followed him from his hotel.