[1] According to his own account in The Mystery of Astronomy made Plain, he was a merchant, had travelled and traded widely; overseas losses led to his being sent to prison for debt.
In confinement Bagwell wrote an Arithmetical Description of the Celestial and Terrestrial Globes; the manuscript is in the British Library.
Philip Bliss, in a note to Anthony Wood[3] states that he dedicated his Sphinx Thebanus or Ingenious Riddle, 1664, to the physician Humphry Brook as patron.
Bagwell also published another short poem, entitled An Affectionate Expostulation for the Pious Employment both of Wit and Wealth.
In 1652 there was published, by order of Oliver Cromwell, A Full Discovery of a Foul Concealment, or a True Narrative of the Proceedings and Transactions of the Committee for the Accompts of the Commonwealth of England with William Bagwell and John Brockedon, accomptants, Discoverers and Plaintiff's against the Committee of Hartford, the Treasurer and Paymaster there in the year 1643; but this William Bagwell may be another person.