Don't think his Sam was Middleton bred if I remember right. His sire was Rex which was Gary's. There was no sister but a brother that was also white( gravel). I spent a lot of time with ken around the time he was getting into the parson club and he registered flint and maybe a dozen of his sons and daughters ( joker, rip, hassle. Barron). The club knew full well they were out of coloured dogs