Putting out a floral welcome mat, the Trustees are opening 10 historic homes across the state on May 19 for free tours of landmark gardens and grounds where writers, artists and the movers and shakers of their day once sought inspiration and serenity.Throughout the fifth annual “Home Sweet Home Open House Day,” visitors can ramble through local sites in Concord and Harvard where Nathaniel Hawthorne and Louisa May Alcott nurtured the seeds of classic novels or grand [...]