What scene in Hound of Baskerville is important? Why do you think it is important? (It can be short or long, idc)

The scene in Hound of Baskerville that is important is when they show the memory of the mansion's last inhabitant fearing a large hound with red eyes. Another important scene is when the tell the legend of the Hound of Baskerville. it is said that the Baskervilles were cursed by a Huge Black Hound that would come for them when they went outside alone.