Anthony à Wood called Walker a "severe partisan", while Thomas Fuller said he was "a man of an holy life, humble heart, and bountiful hand."
[1] His former tutor, Christopher Foster, who held the rectory of St. John Evangelist, Watling Street, the smallest parish in London, resigned that benefice in favour of Walker, who was inducted on 29 April 1614.
[3] His puritanism was displeasing to Laud, who in 1636 mentions him in his yearly report to Charles I as one "who had all his time been but a disorderly and peevish man, and now of late hath very frowardly preached against the Lord Bishop of Ely[4] his book concerning the Lord's Day, set out by authority; but upon a canonical admonition given him to desist he hath recollected himself, and I hope will be advised".
[5] In 1638 appeared his Doctrine of the Sabbath, which bears the imprint of Amsterdam, and contains extreme views of the sanctity of the Lord's day.
[6][7] Walker was committed to prison on 11 November 1638 for some "things tending to faction and disobedience to authority" found in a sermon delivered by him on the 4th of the same month.
A Disputation between Master Walker and a Jesuite in the House of one Thomas Bates, in Bishop's Court in the Old Bailey, concerning the Ecclesiastical Function.
In the last of these, which was directed against John Goodwin, he revived imputations against Wotton, who found a vindicator in Thomas Gataker;[9] in the following year Walker replied.
On 29 January 1645 he preached a fast-day sermon before the House of Commons, which was shortly afterwards published, with an Epistle giving some details of his imprisonment.
He died in his seventieth year in 1651, and was buried in his church in Watling Street, which was destroyed in the Great Fire of London of 1666.