The figure of seaven : Containing divers matters, serious, jocose, pleasant and profitable; fitted to the capacities both of the learned and ignorant. Wherein, is more treated of, then of any subject written before of this kind. By Poor Robin, knight of the Burnt-Island, a well-wisher to the mathematicks. Printed with allowance. - M. P. (Printed for J. Conyers at the Black Raven a little above St. Andrews Church Holborn,, 1686)