We see on page 46 of Delores M. Mustaine’s book that Thomas Mustain’s son-in-law, Zacherias Lewis, served in the Revolutionary War.
Delores’ note is:
Zacherias Lewis served three years in the 10th Virginia Regiment during the Revolutionary War.
He died in 1817, before pension benefits were available to veterans, so no pension statement with his summary of war service would be available as we have for Thomas’ son, Avery.
We find Zacherias listed in this rootsweb roster of Revolutionary War Soldiers and Patriots. On a Windows computer, you can hit Control/F to open a search box in the upper left corner of the list. Then, search by Lewis until you find his name.
LEWIS, Zacherias. Soldier. 10th Va. reg., Continental Line
Wikipedia tells us a bit about the 10th Virginia Regiment. According to Delores’ research above, Zacherias served for three years. Since the regiment was active for just less than four and one-half years, can we assume that Winnie’s husband was not captured?
The 10th Virginia Regiment was raised on December 28, 1775 in western Virginia for service with the Continental Army. The regiment would see action at the Battle of Brandywine, Battle of Germantown, Battle of Monmouth and the Siege of Charleston. Most of the regiment was captured at Charlestown, South Carolina on May 12, 1780 by the British and the regiment was formally disbanded on November 15, 1783.
Watch for some possible confusion about the correct regiment. In this online reference, we see that Ruben Cooper II is named as having been in the 14th, along with a statement that it was sometimes known as the 10th Virgiinia Regiment. Ruben is under #12 on this page:
However, this History of Pittsylvania County mentions both the 14th and 10th. Here Zacherias is clearly in the 10th Regiment.
I found no record for Zacherias when I searched under the “Ancestor” tab on Daughters of the American Revolution (DAR) website. But please recall that any blood descendant of Thomas is eligible, based on Thomas’ material donation and pledge.