Sofford 1623 : a new almanacke and prognostication for the yeere of our Lord God 1623, being the third from the bissextile or leape-yeare : calculated for the latitude and meridian of the most honorable city of London, where the pole is exalted 51 degr. and 32 min. and may very well serue for most parts of Great Britaine. - Sofford, Arthur, (Printed for the Company of Stationers,, 1623)