Between 1710 and 1754 there was no Parliamentary contest in the two-seat constituency of Oxfordshire, but the electoral peace was broken in 1754 when Sir Edward Turner and Lord Parker stood on the new or Whig interest, against the Tories, Lord Wenman and Sir James Dashwood.

This was probably the most notorious county election of the century, and no expense or chicanery was spared by either side. Henry Pelham, 'with the King’s consent and knowledge’, promised £7,000 towards the Whigs’ election expenses, and the Tories spent over £20,000—of which over £8,000 was raised by public subscription. The result, when it came in, was very close:

Viscount Wenman             2033 votes
Sir James Dashwood, Bt.  2014
Viscount Parker                1919   
Sir Edward Turner            1890

The validity of the election was so much in doubt that the Sheriff of the County made a double return, effectively passing the problem to the House of Commons.

Both side petitioned the House, which took six months to determine the outcome of the election. Much time was spent in deciding the validity of individual votes, but in a Whig House of Commons the result was a foregone conclusion.

Sir William Meredith afterwards wrote "39 in 40 of the judges (the Members) knew nothing of the matter, and therefore voted as they liked best. ... Nor, to this hour, can either side tell which had the majority of legal votes, nor any Member of Parliament who voted in that question give any other reason for his vote but as he stood inclined for the old or the new interest of Oxfordshire."

Google Books has an online copy of the list of voters that the Whigs — Turner and Parker — were unhappy about, with their reasons for objection. Most are to do with not owning a Freehold property of sufficient value (40 Shillings) but a few, like Anthony Harris of Deddington, were, apparently,  "Compelled by Threats." to vote for the Tory's.

 

There follows a list of voters, with connections to Deddington, who were objected to by the Whigs:

Name, Place of Freehold, Abode, Reason for objection

Samuel Appletree, Deddington, Deddington, Not a Freehold there in Possession above 12 Months ; not assessed.

John Carter , Deddington, Deddington, Not a Freehold of 40s. a Year there.

John Carter jun., Deddington, Deddington, Not a Freehold of 40s. a Year ; nor assessed there.

William Gammon (possibly), Clifton ?, Clifton, Not a Freehold there, in Possession above 12 months, nor assessed.

Anthony Harris, Deddington, Deddington, Not a Freehold of 40s. a Year : compelled to vote by Threats.

The Rev John Henchman, Deddington Vicarage, Deddington, Not assessed.

John Hopcroft sen., Deddington, Deddington, Not a Freehold of 40s. a Year there.

William Hopcroft, Deddington, Deddington, Not a Freehold of 40s. a Year there ; nor assessed.

Robert Kilby, Clifton, Clifton, No Freehold there.

James Matthews, Deddington, Philip Lant, near Cripplegate, London, Not a Freehold of 40s. a Year there ; nor assessed there.

Samuel Nevill, Deddington, Deddington, Not assessed.

William Parsons, Deddington, Deddington, Not a Freehold of 40s. a Year there ; nor assessed.

John Robertson, Deddington, Deddington, Not a Freehold of 40s. a Year there ; rot assessed.

Charles Shepherd, Taylor ?, Deddington, Deddington, Not a Freehold of 40s. a Year there.

John Skilman, Clifton, Clifton, Not a Freehold ; nor assessed there.

Edmund Wheatley, Deddington, Somerton, No Freehold ; nor assessed there.

Thomas Wyatt, Deddington, Astrop Northants, Not a Freehold in Possession above 12 months.

William Robinson, Deddington, Deddington, Not a Freehold there ; not a Freehold of 40s. A Year there.

The full list can be found in the Google library at
 http://books.google.co.uk/books?id=jScJAAAAQAAJ 

More details of the 1754 and other elections can be found at
 http://www.historyofparliamentonline.org