Sofford, 1621 : a new almanacke, and prognostication, for the yeare of our Lord God, 1621, being the first from the bissextile or leape-yeare : calculated for the latitude and meridian of the most honourable citie of London, where the pole is exalted 51. grad. & 32. min. and may very vvell serue for most parts of Great Brittaine / - Sofford, Arthur, (Printed for the Company of Stationers,, 1621)