The following information is taken from deeds in the hands of the owners of 12 High Street in 2008.  It appears that up to 1768, the land on which 12 and 14 High Street stand was in the same ownership.

The earliest of these deeds is dated May 1809, but contained a schedule summarising earlier documents which were in the possession of Mary Barratt then the owner of what is now 14 High Street.  The list below is ordered by date, and is all taken from this schedule to the 1809 document.

Period Probable owner Probable tenant Comments
well
before 1721		 Christopher Troughton    
to 1721 Thomas and Elizabeth Saul, ne Troughton   Elizabeth was second wife of Thomas Saul, late of Hanslop.  She was daughter and heir to Christopher Troughton
1721 to 1745 Thomas Webb of Shuthanger, Northants, and Sarah his wife   Three persons were transferors of property:
* Christopher Saul of Coutenhall, Northants, gentleman
* Hercules Saul of London, jeweler, son and heir of Thomas
* Thomas Saul of London, cooper, son and heir of Thomas by Elizabeth
Robert Webb and Richard Mawby of Shuthanger were also parties to the transaction
1745 to 1763 Stephen Holloway of Hanslope, joiner  

Transfer was from Thomas Webb, labourer and son and heir of Thomas Webb gentleman;
William Windmill of Hanslope was also a party to the transaction.  His role is not clear, but he may have been mortgagor.
A later mortgage was in name of Stephen Holloway and Jane, his wife; mortgagor was Joseph Churchill of Castlethorpe, yeoman; later transferred to Thomas Osborne of Stoke Goldington, shopkeeper
1763 to 1768 William Kitelee of Hanslope, lace merchant   There was also an assignment of mortgage to William Kitelee, also involving Joseph Kitelee of Castethorpe, yeoman as trustee for William Kitelee
1768 to 1787 Abraham Phillips of Hanslop, laceman   The land transferred is a "piece of ground in Hanslop".  From the context, it is likely this is the separation of the land on which 14 High Street stands from the rest of the land transferred above.
1787 to 1805 John Kitelee, grazier and John Cole of Northampton   Transferors were Abraham Phillips and his wife ffanny.  There was also a bond of indemnity against the dower of ffanny, wife of Abraham Phillips.
1805 to 1807 Henry Dawson of Hanslope, surgeon   Transfer from above
An assignment of mortgage also involved:
  Thomas and Joseph Kitelee as executors of Joseph kitelee
  John Kitelee, grazier
  John Cole of Northampton, gentleman
  Henry Dawson of Hanslope, surgeon
  John Dawson of Middlesex, gentleman
1807 to ? Mary Barratt of Hanslope, widow   transfer from Henry Dawson
Source of above information: Deeds held by owner of 10-12 High Street in 2008