Rosedown Plantation State Historic Site in St. Francisville will host a lecture and book signing featuring author David D. Plater's "The Butlers of Iberville Parish, Louisiana," from 1 p.m. to 3 p.m. Saturday in the site's gift shop.

Plater, a retired maritime lawyer, history teacher and the former manager of Acadia Plantation in Thibodaux, has employed a wealth of primary source information and spent many years researching the lives of this Louisiana family, according to a news release.

Published by LSU Press, the book offers a detailed portrait of a wealthy 19th-century family with genealogical ties to Martha Custis Washington. Beginning with the early 1830s, the book explores the lives of the Butlers through the turmoil of the Civil War years, the eventual dissolution of the South’s slavery-based economy, and continues through the family’s lives during the difficult Reconstruction era, the release said.

During his lecture, Plater will give special attention to the life of Caroline Swanwick Butler, Martha Washington’s great, great-granddaughter. It was through Butler’s marriage to the Turnbulls' son, William, that the family gained their genealogical tie to the Custis lineage.

Rosedown on La. Hwy. 10 is open daily from 9 a.m. to 5 p.m. except Thanksgiving, Christmas and New Year’s Day.

For information, call (225) 635-3110 or visit lastateparks.com.