I just looked in the Diocese of Carlisle marriage licences to see if any of the marriages mentioned had licences. I have no knowledge of the Sill family but just in case you can glean something from the entry (Sill not being that common a name):
08 Nov 1729
groom: John Bushby, of Hole, Wigton, gentleman
bride: Mary Sill, of parish Wigton, widow (above 21 years)
bondsman: Joseph Tiffen (or Tiften) of Crosshill, Wigton yeoman or gentleman
marriage to take place at Wigton
regards
Deborah