Once again this summer Wilmington’s tireless town nurse, Jennifer Fitzgerald, has organized a series of free lectures, not just for seniors but for everybody, under the subject heading of “Avoiding Social Isolation.” The meetings will be every Thursday afternoon from 3 to 4:30 pm, all but the first one on July 11 to be held, as usual, in the basement community room of St. Mary’s in the Mountains on Route 9 East in Wilmington.