There are daily experiences of Island life, such as being on a first-name basis with just about everyone, that become routine so gently we are hardly aware of their idiosyncratic aspect. We take for granted having to wait in a line of cars while a boat is hauled across the road, or seeing swooping gulls open scallop shells by dropping them on the road in front of us, or knowing that when we get out of a movie at 10 p.m., the only place to go is home. But the cherry on top of this quirky Vineyard confection is our town post offices.