it was described as follows: <blockquote> St Mary's Catholic Chapel Moorfields. This organ erected by Bevington and Son at an expense of £1000 has three rows of keys, an octave and a half of pedal pipes, and nine composition pedals. Service at eleven and six o'clock. Organist Mr Vincent Novello.<ref>[https://books.google.com/books?id=QktgAAAAcAAJ&pg=PA110 Hamiltons Catechism of the Organ] by Joseph Warren (London, Cocks and Co, 1842; second edition), p. 74, accessed 16 May 2016. GREAT ORGAN 1 Open Diapason No 1, 2 Ditto ditto No 2, 3 Stopped ditto No 1, 4 Ditto No 2, 5 Principal No 1, 6 Ditto ditto No 2, 7 Twelfth, 8 Fifteenth, 9 Sesquialtera 4 ranks, 10 Mixture 3 ranks, 11 Trumpet, 12 Ditto, 13 Clarion; CHOIR ORGAN 1/ Open Diapason, 2/ Stopped ditto, 3/ Dulciana, 4/ Principal, 5/ Fifteenth, 6/ Mixture 3 ranks, 7/ Flute, 8/ Cromorne; SWELL ORGAN 1/ Double Diapaso, 2/ Open ditto, 3/ Stopped ditto, 4/ Principal, 5/ Cornet 3 ranks, 6/ Trumpet, 7/ Clarion, 8/ Hautboy, 9/ Cromorne. [There is no detail given of the Pedal Organ] </ref> </blockquote> According to an article in the Musical Standard (2 July 1892) the first organ in the new church was by Bishop and Starr (1820), and so the c.1830 Bevington organ referred to above may well have been a replacement of that organ, or an enlargement of it. The article also states that the organ-building firm of William Hill & Sons rebuilt the organ at some time between 1871 and 1873. From the same Musical Standard'' article we also learn the names of the early organists of the parish: Vincent Novello, 1820–1840s Anthony Lejeune Senior, 1840s–[until his death] Anthony Lejeune Junior, [at father's death]-1871 Mr Arscott, of Jersey, 1871–1873 Mr J. H. Leipold, "Professor at the Guildhall School of Music [...] a pupil of Josef Rheinberger and Dr Hans von Bulow.", 1873– When the Finsbury Square building was closed and demolished this instrument was dismantled and in 1905 rebuilt by the organ building firm of Bishop and Son in the Ilford (Essex) Presbyterian Church. The pipe organ in the current building is situated on a gallery at the liturgical-west end and made by the organ building firm of Corps, which flourished variously in Reading (Surrey), Norwich (Norfolk) and Camden Town (London) until about 1870. This date suggests that the organ was purchased second-hand, but its original location and the details of who installed the