Who is Capt. Lynch and Mr. Fitzgibbon 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

The broken-nosed, incorruptible sea captain chosen by John Charity Spring to transport narrator Sir Harry Flashman (in the guise of Beauchamp Milward Comber) to Baltimore, MD, Lynch is a powerful man, able to toss Flashy about like a gunny sack. He declares that he is Spring's friend and believes in slavery, which Flashy is said to oppose. He assigns Flashy to his first mate, Fitzgibbon, an equally competent sailor, to fulfill his menial duties during the voyage.