He worked abroad in Sweden and Holland before returning in 1643.
His brother, Thomas, was made Engraver of Coin in 1645.
Simon's self-portrait is in the National Portrait Gallery (London), and shows the skills that he brought to the wax models he created.
[1] His brother's sketchbook is in the Victoria and Albert Museum.
A portrait of him as St. Jerome was painted by Heinrich Dittmers in 1665.