Here are some potential reasons Conan Doyle may have included them:
* Atmospheric Setting: The presence of a "gypsy" encampment adds a touch of mystery and intrigue to the story's setting. It conjures images of a remote, slightly unsettling countryside that contrasts with the grandeur of the Roylott manor.
* Folklore and Superstition: "Gypsies" in Victorian literature were often associated with folklore, superstition, and the occult. Their presence subtly hints at the supernatural elements that will later be revealed in the story.
* Social Commentary: Doyle may have been subtly commenting on the social prejudices of the time, where "gypsies" were often marginalized and viewed with suspicion. The fact that they are mentioned but play no active role in the story could be seen as a reflection of their limited social standing.
However, it's important to note that:
* The term "gypsy" is considered outdated and offensive today. It's a slur that perpetuates harmful stereotypes.
* The "gypsies" in the story have no real connection to the plot. Their inclusion is purely atmospheric and doesn't contribute to the mystery itself.
Ultimately, it's up to each reader to interpret the significance of their presence. While it's possible to read into Doyle's intentions, it's important to remember that the story's focus is on the murder mystery, and the "gypsies" are merely a minor detail.