Who is Francis Jackson (Frank) Meriam from Flashman & the Angel of the Lord: From the Flashman Papers, 1858-59 and what is their importance? "Flashman_&_the_Angel_of_the_Lord:_From_the_Flashman_Papers

Francis Jackson Meriam is a tall man with a limp. He is also missing one eye. Meriam visits the Kennedy Farm in the company of John Henry Kagi, bringing Brown $600, which insures Brown will attack Harper's Ferry. As a result, Flashman makes a break for freedom. Unfortunately, he is captured by Joe Simmons before he can leave the barn.