What is the author's style in Flashman's Lady by George MacDonald Fraser?

Flashman's Lady is told in British English. The narrator is an octogenarian writing about his life and career early in the 20th century, but the events described fall in 1842-45. There is much 19th-century jargon used, particularly that of cricket. The book opens with Flashy grousing about how the game has changed since his playing days, and the first few chapters are thick with arcane terms. Flashy's enthusiasm for the game, however, comes through the clutter, which sometimes requires several readings to follow the action properly.