My husband, who is highly knowledgeable about nautical matters, says that Maggie got the sail names right but didn't specify the rigging. But her main goal was to impress Joe, and she certainly accomplished that. And she plies him with enough coffee to to keep him at the cottage till after 2:00 a.m., even though he probably has to get up for work at something like 4:00 a.m.
In her terror, poor Vicki has doubled the number of rooms at Collinwood from 40 to 80, possibly reflecting her fear that whoever is looking for her will take quite a long time to find her.
Before Roger opens the secret panel (hooray!) in the drawing room, he carefully turns out all the lights--but leaves the fire burning merrily away. Later, Carolyn comes downstairs and is surprised to see that the drawing room is empty--but surely she knows about the secret panel herself.
We also see the spiral staircase for the first time, I believe. It will figure prominently in two other storylines that I can remember.
Once again, Roger shows his cruel streak, maybe so he'll look like more of a hero when he finally releases Vicki from her prison. But then there's that seaweed....