Details of his life after university are unclear, though there are intimations of legal troubles, disorderly affairs, dodging creditors.
He fought in the Low Countries during this period, apparently under Sir Sigismund Alexander according to Anthony à Wood, and in 1629 was indicted for assaulting one Edward Moore with his sword and wounding the man's head.
[4] Marmion's second play, A Fine Companion, was staged in 1632 or 1633 and published in the latter year, after being performed by the Prince Charles's Men at Salisbury Court Theatre.
And while he is often classified by critics as a limited talent and a figure of at best secondary importance, his knack with satire has frequently been praised.
In 1638 Marmion joined Sir John Suckling's privately organized military incursion against the Scottish Covenanters; but he fell out along the route due to illness and returned in London, where he died the following year.