I have information that my 4th great grandfather, Jean Henri Matthey, was a military lieutenant. He died before 1835. His father was Pierre Matthey. I have his birth certificate from the Registry of the Parish of Dombression and Savagnier, Principality and State of Neuchatel and Valagin in Switzerland, born Dec 13, 1800. Where can I find additional information about him. Thanks, Karen Matthey Fowler