For What Service?

"Tobie Matthew was knighted at Royston, not long since, but for what service, God knows."

'The indefatigable correspondent, Chamberlain, wrote on October 25th, 1623, to Carleton'
FROM: Sir Tobie Matthew: Bacon's Alter Ego by his kinsman Arnold Harris Matthew (De jure Earl Of Landaff, Of Thomastown, County Tipperary) and Annette Calthrop (1907)