If you have read Orly's filing with the California Supreme Court, you'll see the discussion about natural born citizen begin on page 8; here is the link.
This is new from Leo's web site:

"Iíve been forwarded the actual naturalization record for William Arthur on microfiche, obtained from the Library of Congress.   He was naturalized in New York State and became a United States citizen in August 1843.

"Chester Arthur perpetrated a fraud as to his eligibility to be Vice President by spreading various lies about his parentsí heritage.  President Arthurís father, William Arthur, became a United States citizen in August 1843.  But Chester Arthur was born in 1829.  Therefore, he was a British Citizen by descent, and a dual citizen at birth, if not his whole life.

He wasnít a ďnatural born citizenĒ and he knew it.

"Weíve also uncovered many lies told by Chester Arthur to the press which kept this fact from public view when he ran for Vice President in 1880.  Garfield won the election, became President in 1881, and was assassinated by a fanatical Chester Arthur supporter that same year....

"Chester Arthurís lies came during his Vice Presidential campaign in 1880.  His fraudulent attempt to obfuscate family history provides context and evidence that in 1880 it was recognized that having been born as a British citizen would make one ineligible to be President or VP.  His falsification of family history indicates he was aware of POTUS ineligibility...


"Chester Arthur was in politics at the time of the 14th Amendmentís ratification.  He was a lawyer and a politician while the 14th Amendment was being debated.  It was ratified in 1867.  In that same year Chester Arthur rose to become chairperson of the Executive Committee of the State Republican Committee.   He would have been fully cognizant of the natural born citizen issue and that should he ever run for POTUS or VP, problems could arise.

"He would have known that if anybody found out his father naturalized after he was born, he could never be President or Vice President."