How is Dr. John Watson observant? Please give evidence from the text.

Watson's Observations:

Of course, so far as his concealment goes there is no difficulty at all. Any one of these stone huts would give him a hiding-place. But there is nothing to eat unless he were to catch and slaughter one of the moor sheep. We think, therefore, that he has gone, and the outlying farmers sleep the better in consequence.

The fact is that our friend, the baronet, begins to display a considerable interest in our fair neighbour. It is not to be wondered at, for time hangs heavily in this lonely spot to an active man like him, and she is a very fascinating and beautiful woman. There is something tropical and exotic about her which forms a singular contrast to her cool and unemotional brother. Yet he also gives the idea of hidden fires.

On our way back we stayed for lunch at Merripit House, and it was there that Sir Henry made the acquaintance of Miss Stapleton. From the first moment that he saw her he appeared to be strongly attracted by her, and I am much mistaken if the feeling was not mutual.