Remember what the priest's letter says of Teresa's feeling towards you, and then say--Is it so very unlikely that she has brought with her to England one of the poisons used by her husband in his trade?
and is it quite unreasonable to suppose (when she looks at her canister) that she may be thinking of you?
"I may be right or I may be wrong.

Thanks to the dilapidated condition of a lock, I can decide the question, at the first opportunity offered to me by the nurse's absence from the room.
"My next report shall tell you that I have contrived to provide myself with a sample of the powder--leaving the canister undisturbed.

The sample shall be tested by a chemist.

If he pronounces it to be poison, I have a bold course of action to propose.
"As soon as you are well enough to go to the house, give the nurse her chance of poisoning you.
"Dear madam, don't be alarmed! I will accompany you; and I will answer for the result.

We will pay our visit at tea-time.