Provided always, that the aforesaid provisions against trespassers and persons found on any land shall not extend F2to any person hunting or coursing upon any lands with hounds or greyhounds, and being in fresh pursuit of any deer, hare, or fox already started upon any other land, . . . F1 nor to any lord or any steward of the crown of any manor, lordship, or royalty, or reputed manor, lordship, or royalty, nor to any gamekeeper lawfully appointed by such lord or steward within the limits of such manor, lordship, or royalty, or reputed manor, lordship, or royalty.