She sent Warne some new color illustrations with a copy of her privately printed edition . Warne then gave these two the famous picture book artist , L. Leslie Brooke , to see what he thought about the pictures . She sent Warne several `` several color illustrations , along with a copy of her privately printed edition '' which Warne then handed to their eminent childrens book illustrator L. Leslie Brooke for his professional opinion , who was impressed with to Potter 's work .