Mr. and Mrs. Robert Heuston Cotter of Lilburn will celebrate their 70th wedding anniversary on Friday. The couple was married in 1938 in Miami. Mr. Cotter is a native of Valdosta and Mrs. Cotter is the former Erma Stanley of Dacula. The couple moved to Lilburn in 1959 when Mr. Cotter was transferred with the U.S. Navy to the Naval Air Station in Atlanta, where he retired in 1963. The couple has three daughters, eight grandchildren and eleven great-grandchildren. The couple's family and friends will be giving them a dinner in honor of their 70th wedding anniversary.