Edited to add: regarding those woollies, a good bit of the Iroquois pack's English blood comes from Cottesmore and North Cotswold lines, both of which had some Welsh, as described by Michael Clayton:
A further policy of out-cross breeding arrived with the Mastership of Capt. Brian Fanshawe (1981-92) from the North Cotswold. In the Cottesmore kennel he used Welsh lines through the stallion hound North Cotswold Craven (’78) going back to the Curre sire Saucy (’47) who was used in the North Cotswold kennel by Brian’s parents, Major and Mrs R.G. Fanshawe in the early postwar years. Further Welsh blood came to the Cottesmore from the Bicester and Warden Hill kennel where Brian’s cousin, Capt. Ian Farquhar was Joint Master and huntsman. Bicester Granby (’88), by Cotswold Grappler (’85) was used in the Cottesmore kennel.
On the bottom line, this introduced Welsh blood going back to the Bicester’s influential dam Fairy (’73), drafted from the Vale of Clettwr. This line tended to reproduce marked broken coats, or “woollies”, and these became more evident in some hounds in the Cottesmore pack during Brian Fanshawe’s Mastership. Not everyone in the Shires approved of these “woolly” hounds, but they had to admit that the Captain had bred an effective working pack that produced remarkably good sport, especially in the early part of drier seasons when scenting conditions were unhelpful in Leicesteshire and Rutland.