A hundred feet away, Abraham de la Vega was hiding in the wings with a spyglass, made of lenses ground, to tolerances of a few thousandths of an inch, by his late second cousin, Baruch de Spinoza. Through those lenses, he saw the veil descend. He was nine years old. He moved through the backstage and out of the opera-house like the moon-shadow of a nightingale. Aaron de la Vega, his uncle, was waiting there astride a swift horse.