Before turning 14, Henry Glapthorne had matriculated as a pensioner at Corpus Christi College, Cambridge, but there is no record of him ever taking a degree.
There is evidence that he may have been employed as a groom-porter in a nobleman's household for some of that time – a later document refers to him as "Glapthorne the Porter" – but there is nothing conclusive.
In 1883, the editor A. H. Bullen attributed to Glapthorne the anonymous play The Lady Mother, written c. 1633–1635, which has been accepted by the consensus of critical opinion.
On 23 March 1643, Susan was buried in the nearby parish of St Andrew's, Holborn, having died the day before in Fetter Lane.
He, his printer Richard Herne and others, were supposed to be brought in to give evidence on the subject a few weeks later, but no further record has been found of what happened to him.