In 1583, Burghley appointed Chamber, with Henry Savile and Thomas Digges, to sit on a commission to consider whether England should adopt the Gregorian calendar, as proposed by John Dee, and in 1584 he applied through Merton for a licence to practise medicine.
[1] In 1593 Chamber received the preferment of prebendary of Netherbury in Terra at Salisbury Cathedral, and in June 1601[2] became a canon of St George's Chapel, Windsor.
A memorial there (since lost) recorded that Chamber left £1,000 to Merton to endow two scholarships for boys from Eton and £50 to assist the poor of Windsor.
This was followed by Chamber's Treatise Against Judiciall Astrologie (1601), an anti-astrological work with which was bound his Astronomiae encomium, an Oxford oration on the Almagest delivered in 1574.
[3] Christopher Heydon responded with A Defence of Judicial Astrology (1603), a ponderous work which claimed that Chamber had misunderstood those he relied on, while plagiarizing from them.