She evidently wanted it to be accepted that his falling into the well was his own act.
I cannot suppose that she expected to convince you, the eye-witness; but if she wished later on to spread the story, it was wise of her to try to get your acceptance of it." "That is so!" "Then there were other matters of untruth.

That, for instance, of the ermine collar embroidered with emeralds.

If an understandable reason be required for this, it would be to draw attention away from the green lights which were seen in the room, and especially in the well-hole.

Any unprejudiced person would accept the green lights to be the eyes of a great snake, such as tradition pointed to living in the well-hole.

In fine, therefore, Lady Arabella wanted the general belief to be that there was no snake of the kind in Diana's Grove.