[4] Day's return to Aldersgate coincided with the third printing run of his father's highly successful publication of John Foxe's Actes and Monuments.
As a result, Day's father imposed strict constraints on him to maintain close scrutiny of his work, which led to a strain in their relations.
He also started pirating his father's works, issuing illicit editions of The ABC with Little Catechism and The Whole Booke of Psalmes, Collected into English Meter.
The public act may have been an attempt by John Day to send a message that he would pursue issues of piracy, no matter who the perpetrator.
When Thomas Morley published Richard Allison's Psalmes of David in Metre in 1599, he sued, claiming this infringed on the Day patent for printing the metrical psalter.