Secreted into Burns Lane, this elegant store full of Italian-made delights is well worth the hunt. But beware, once you write a letter on handmade Italian paper, sleep on Italian linens, wear an Italian fragrance or set a table with handmade Italian ceramics, nothing else will ever compare. As soon as your supply of stationery runs out you’ll be planning an expensive supply run to the rolling hills and cobblestone streets of Tuscany and Umbria. Donatella and Giulio della Porta,owners of The Hidden Countship, solve that problem by helping . . .