When Bell saw the three witches at the hospital, in the same hallway where they were watching her family, she immediately went to them only for them to walk away.
Bianca followed Bell leaving their family confused about what was going on. But once Bell and Bianca rounded the hallway, the three witches were nowhere to be found.
Once Brylee and her daughter were settled, they talked about what Bell and Bianca saw.
Bianca confirmed that they were the three witches in her dream and in Verena's vision. The witches who were searching for Evanora. Briony also confirmed how powerful they were.
The following day after making sure that Brylee and her daughter were healthy and there were no complications, Bell, Bianca and Brina went to the elders and informed them that the three witches appeared in front of them.