Detective Inspector Frank Abbott of Scotland Yard, whom she not infrequently reproves for extravagance of speech, has been known to declare that Miss Silver has only one hat, and that it is fifteen years old if it is a day. This is not the case.
She has always possessed at least two hats, a straw for summer and a felt for winter wear. In fact, she usually has two of each, since at stated intervals a new one is acquired and its predecessor relegated to second-best. All these hats are black and of an invariable shape, though there are seasonal variations in the shape of ribbon bows and little bunches of flowers… [This hat] had a meek black ribbon bow on one side and a tight bunch of pansies and mignonette on the other. The bow was clamped to the hat by a jet buckle. The pansies were transfixed by a dangerous-looking steel hatpin. Nothing could have been more consoling commonplace. Nobody could have looked less like a private detective.
The Ivory Dagger, Patricia Wentworth