As Beaumont's account (WREN 1) explains, part of the MS was published in the 'Increpatio [rebuke/chastisement] Bar Jesu' published by Matthew Wren's son, also Matthew, in 1660 (Londini, typis Jacobi Flesheri. Prostant apud Cornelium Bee, in vico Litle-Britain dicto). The full title is 'Increpatio Bar Jesu, sive, Polemicæ adsertiones locorum aliquot S. Scripturæ, ab imposturis perversionum in catechesi Racoviana collectæ hinc inde, per Matthæum Wren F ; ex opere prægrandi meditationum criticarum in S. Paginam, conscriptarum a Patre suo R.D.M. Episcopo Eliensi in Solitudino sua carcerariâ, de genuino sensu, atque exactâ nostrâ versione divinorum textuum ; consilium hujus editionis paret è praefamine.' It was reprinted in Pearson's 'Critici Sacri' also of 1660 and in 1669 (Amstelodami, Ex Officiana Johannis a Someren, Bibliopolæ). The Peterhouse copy (B.6.19) of the ‘Increpatio’records that other parts of these MSS were made use of by William Richardson (Master of Emmanuel) in his 'De praesulibus Angliae commentarius . . .' (Cambridge, 1743).
As to the MS itself (WREN 4): it is written in two columns, very close set, in Latin and English, with citations in Greek and Hebrew, and comprises 438 bifolia, paginated to p. 873 (which contains a single column), and 1331 sections. There are occasional slips pinned or pasted in. At section 555, which is where the material for the ‘Increpatio Bar Jesu’ starts, is a note that Wren has recently come by a copy of the Racovian catechism references to which are inserted after each section. ‘Facta est nuper mihi copia pellegendi Catechismum Racovianum [sic]; Ad cujus paginas referrunt Majusculae Literae, quas in paragraphis antecedentis sectionis reperirie est sparsim interjectis , sic: A. par. 1. pag. 91. B. par.3. pag. 52’. These references to the Catechism are inserted directly in the ‘Increpatio’ as they occur as ‘Catech. Racov (or Cat. Rac. or C.R.) p. 91’, etc., rather than at the end of sections as in the MS. These references are, as stated in the ‘Increpatio’, to the first Latin edition of 1609 printed at Racow (confirmed by the digital images of the copy in the Austrian National Library). (There were, in fact, two Latin editions in 1609, one without a given place of printing.) Wren’s attention may have been particularly drawn to the book by the vote in Parliament on 2 April 1652 that the edition printed in London (Wing C1651) should be publicly burnt at the London Exchange and Westminster Yard on 6 and 8 April following.
There is some indication that Matthew Wren junior was preparing the publication while his father was still working on the MS: from p. 619 there are occasional notes at the foot of a sheet; the first reading ‘Recept: 6 sequent: Sched. Julij 13 1655’, the last, on p. 863 ‘Haec Scheda recepta Sept. 16 1659’, showing that sections of the text were being passed over to him for editing handful by handful.
Matthew Wren junior (1629-1673) was born in Peterhouse. His studies were interrupted by the Civil War, from which he emerged as Secretary to the Earl of Clarendon and to the Duke of York and M.P. for Mitchell, Cornwall, from 1661 to 1672. He was an early, perhaps founding, fellow of the Royal Society and, apart from the ‘Increpatio’ author of ‘Considerations on Mr Harrington's...Oceana’.
He died, unmarried on 14 June 1672 and is buried in the chapel of Pembroke College, Cambridge.
For futher details see Stuart Handley, ‘Wren, Matthew (1629–1672)’, Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, Jan 2008. [http://www.oxforddnb.com/view/article/30022, accessed 29 Oct 2014])