Part A: The tone found in the excerpt from Virgil's "The Aeneid" appears to be Ghoulish. The description of the old figure with disheveled white hairs, fiery eyes, and a filthy mantle evokes a sense of decay and eeriness, which aligns with a ghoulish tone.
Part B: The quote from "The Aeneid" that best supports the answer to Part A is: "And here a multitude was rushing, swarming / shoreward, with men and mothers, bodies of / high-hearted heroes stripped of life..." (lines 13-15). This quote reinforces the ghoulish tone by depicting a scene of death and loss, emphasizing the somber and haunting atmosphere present in the narrative.