I hope you can be of help.
George Preston born England BORN MAYBE AROUND 1820 ENGLAND
married Mary Niblett 1808 ENGLAND
1. GEORGE B. PRESTON BORN ABOUT 1841
mARY NIBLETT HAD PREVIOUSLY BEEN MARRIED TO GEORGE HOLMES.
I realize this isn't much to go on. I do know that Mary Niblet Preston Holmes worked for Queen Victoria, either as a kitchen worker or table server. She had a brother John Henry Niblett who was born 1826 Glouchestershire, England. He came to the US at the end of the Civil War, but his sister was here earlier.
George Preston Sr. also was a soldier of the Civil War, and served in Oklahoma and Arkansas. He died at Fort Smith, Arkansas as did his wife Mary Niblett Holmes Preston, she left a will.
Wanda Greathouse email@example.com