Several newspaper cuttings have been sent to me with the story of my dog which appeared in the _Spectator_ of January 18th, and one or two of them suggest a doubt as to the veracity of the story. I write, therefore, to tell you that it is literally true, only that the policeman was away for his holiday instead of having influenza, and the case came off on Tuesday instead of Saturday. My dog is a pug, a very choice specimen of his kind, and was given to me by the late Dr. Wakley, editor of the _Lancet_, who was a great connoisseur in dogs. His intelligence is really marvellous, and he has done many things as extraordinary as the one related by Miss Wood. He is devotedly attached to my baby, and always accompanies me in my morning visit to the nursery. On one occasion the child (who is just as fond of him as he is of her) was very ill, and for three weeks was unconscious. As soon as this was the case, the dog ceased to go near the nursery, as if by instinct he knew he would not be noticed. Mr. Walters from Reading was attending the baby, and the dog soon got to know the time he paid his visits. He would watch him upstairs, and when he came down listen most attentively to his report. At length the child was pronounced out of danger. The very next morning, up went master Sam, made his way straight to the child's cot, and stood on his hind legs to be caressed. Although she had taken no notice of any one for some time, she seemed to know the dog, and tried to move her hand towards him to be licked. He quite understood the action, licked the little hand lovingly, and then trotted contentedly away. After this he went up to see her regularly, as he had been accustomed to do. He is quite a character in the town, and nearly every one knows Sammy Weller. Before I had this dog, I always thought I understood the difference between reason and instinct, but his intelligence has quite puzzled me. MARY H. BARFORD. ARE DOGS "COLOUR-BLIND"? [_Jan. 12, 1884._] Your correspondent, "W. H. O'Shea," has found several dogs "colour-blind," If black is a colour, I can give several instances in which a black retriever dog of mine was certainly _not_ "colour-blind." He had the greatest antipathy to sweeps and coalheavers, and would fly at them if not fastened up or carefully watched. He would even bark at a passing hearse! In all other respects, he was the best-tempered dog in the world, and I can only imagine that when very young he must have been ill-used by either a sweep or a coalheaver. C. R. T. LUCKY AND UNLUCKY. [_April 28, 1877._]