Nicholson (P H)

write to Nicholson (P H) 4.8.1804
Coded in GD website to William Nicholson DNB 1753-1815 which may well be correct but in that case what did P H stand for? Godwin may have used PH to distinguish this person from his usual Nicholson. I wondered if P H stood for Political Herald this could have been a former colleague of Godwin's