There's more than one reason the new West Tisbury police chief officially made 92-year old Victoria Trumbull her deputy. For one thing, Victoria knows just about everything about everyone in town, and a lot about the rest of the Martha's Vineyard year-round population as well. Not to mention their ancestors. Victoria may be afflicted with the usual aches and pains that descend on nonagenarians (she has a cutoff shoe to accommodate her bunion, and a stout stick to help her on her walks across the fields and in the woods). But she is as sharp and as sharpeyed as the proverbial tack. So it's not odd that when Victoria is the only one who notices something amiss among the gravestones of the West Tisbury cemetery, the chief listens.