Glafman,
I hope you are not reading us wrong. I think everyone on this forum would love for this to be the original sign from the Atsion Mansion. No one more so than I. The sign would set off the recently restored mansion beautifully. But, the state may want more proof.
In his book Pierce says Samuel was named after his uncle Samuel Patrick, and I am sure that is right. However, I am named after my uncle Donald Lucas but my middle name is not Lucas, small point I know. However, nowhere in this book or any book is he referred to as Samuel P. Richards. So, maybe we need more info on the middle P. It's been many year now, but I have read several original papers on Atsion and I can not remember ever seeing the initial P in his name. Either in correspondence to him or from him. I think if you could find an original document from Atsion with Samuel P. Richards on it or even better signed Samuel P. Richards it would be a lock. One question is, would he have a sign made up with a middle initial on it if he did not use one? Burlington County Historical Society has papers on Atsion and of course the State Archives in Trenton has a large collection. Or maybe the state historian would look in to it.
It's funny, nothing comes easy. In the story on ebay they mention that Josh Lippincott was the heir of Joseph Wharton. After looking in to it Lippincott would be one of the heirs. Joshua Lippincott married Wharton's oldest daughter Joanna Wharton. However, Samuel P. Richards, son of Jesse Richards also married Sarah Lippincott. So we have Lippincotts in both Atsion and Batsto. I like the Lipincott's of Atsion because there were three generation of Joshua Lipincotts and they mention Josh Lippincott in the store on ebay. They also mention the names Brown and Bozarth, again these names were in Batsto and Atsion.
In any event you have a true treasure there and it belongs hanging in it's proper place, whether it be, Atsion or Batsto.
Also, Ben is right. Any dealings with the state should be in writing. On loan with the stipulation it is to be displayed is always better than a donation. Than if they want to store it somewhere you could always get it back before they store it. Once they store it, it may never be seem again.
I think you have a great idea, Good Luck, Don