Registered as a brown dog, Jack was bred by Alice T. McLean, in 1937 with an inbreeding coefficient of .5%. He had one littermate but no full siblings. Of the 8 half siblings on his sire's side and 2 on his dam's side, none were champtions. Jack was bred only one time producing 2 offspring including Ch. John Paul Jones of Groton. Jack was the Best Of Breed winner at Westminster KC in 1941. He was one of Mrs. theo Randolph's first Norwich and she considered him a bit short-legged.