John Jackson will talk about his family’s local, three-generation seafood businesses at 2:00 on Sunday, August 13. A fifth-generation Rockport native, Jackson will discuss the trials and tribulations of the seafood business and his family’s deep ties to the history of Rockport. Jackson is the founding partner of The Rockport Group at Morgan Stanley and has been active in local civic and history groups all his life. Copies of his book, “Taking The Tide,” will be available for sale, with proceeds benefiting the History Center.