No clue has been found as yet to indicate its location. According to Kelly's directory it was still around in 1900 but these trade directories have to be treated with a degree of suspicion. It may be that the Plough referred to by some is the Plough, Ashley.
Pigot 1830 definitely puts the Plough in Newmarket
|1865||sold by C.Philips (ret brewer)||Bury & Norwich Post|