MESSENGER, son of Mambrino, was a grey horse about fifteen hands two inches high, with strong, heavy bone and a generally coarse appearance for a horse represented to be thoroughbred. From the Racing Calendar, and not from the Stud Book, we learn that he was foaled 1780, and came out of a mare represented to be by Turf, and she out of a mare by Regulus, son of Godolphin Arabian, etc., as represented by Mr. Weatherby in his Stud Book. By looking back to the beginning of this chapter the form in which the entry appears in the Stud Book will be fully comprehended. The identity, history, and breeding of the dam of Messenger is the central point in this inquiry, and we must do our work carefully and thoroughly. From the form of the entry in the Stud Book, it will be understood that the breeder of each animal is supposed to appear opposite the foals of his own breeding, but this we have found in more than a thousand instances to be wholly imaginary on the part of the compiler. If the animal ran, the name of the party running him is far more apt to appear than the name of the breeder. It will be observed, also, that the Turf fillies of 1773 and 1774 appear without their color being known. These fillies seem to be put in there to partially fill the gap between 1771 and 1777. Mr. Pick says the dam of Messenger was black, but he gives no account of her further than that. Whether Mr. Pick was indebted to Mr. Weatherby, or Weatherby to Pick, I cannot say, but they both give the pedigree just as we have given it in this country. I am not inquiring whether these authorities agree on this pedigree, but whether they knew anything about it, and whether there is such agreement in details between them as will support each other.