The "unsurrendered flag" carried by Beaufort's Civil War militia will be the showpiece of an exhibit opening Friday at the Verdier House, 801 Bay St., Beaufort, in observation of Beaufort's tricentennial and the sesquicentennial of the Civil War. The exhibit, "The Beaufort Artillery: Guardians of the Lowcountry Since 1776," was developed by Historic Beaufort Foundation and curated by Ron Roth. The exhibit will be open from 10 a.m. to 4 p.m., Monday through Saturday. Admission is $10 a person and includes a tour of the Verdier House. Admittance for schoolchildren is free.