Gumdante 1621 : a new almanacke and prognostication for the yeare of our redemption 1621, being first after leape-yeare : calculated and composed according to art, for the latitude and meridian of the citie of London, and may well serue for all the south parts of Great Brittaine / - Gumdante, Edward. (Printed for the Company of Stationers,, 1621)