The name 'Hog's Pudding' appears from time-to-time at least since the early 1700's, throughout England, as a synonym for 'White Pudding', but has long come to have a particular association with Devon and Cornwall.

Cornish Hog's Pudding
Image: http://www.westernmorningnews.co.uk
Original Receipt from the 'Handy Guide for Pork Butchers, Butchers, Bacon Curers, Sausage & Brawn Manufacturers, Provision Merchants, Etc 'by Thomas B. Finney, 1938 [This is an OCR scan and may contain errors - we're obliged to Graeme Cobbledick for pointing out the curious salt quantitles]Hog's Puddings
Devonshire:
14 lbs Lean Pork
4lbs Fat Pork
3lbs PAB (Rusk)
2 quarts water
Seasoning:
8lbs Salt
4lbs White pepper
1oz Ground Cayenne
½oz Ground Mace
½oz Ground Nutmeg
1oz Ground Thyme
Use at ½oz per pound of pudding mixture.
Mix well and chop fine, fill into wide hog or narrow bullock casings. Boil ½ hour and place into cold water 'till cold.
Cornish:
10 lbs Lean Pork
4lbs Fat Pork
2lbs PAB (Rusk)
2 quarts water
Seasoning:
4½lbs Salt
2lbs White pepper
½oz Rubbed Parsley
1oz Rubbed Thyme
¾oz Ground Mace
¾oz Ground Nutmeg
Use at ½oz per pound of pudding mixture.
Mix well and chop fine, fill into wide hog or narrow bullock casings. Boil ½ hour and place into cold water 'till cold.

Western Morning News - Saturday 4 June 1932