Ann Sheppard Mounsey, or Ann Mounsey Bartholomew on marriage (1811–1891), was born on 17 April 1811 at 21 Old Compton Street, Soho, London, the eldest child of Thomas Mounsey, a licensed victualler, and his wife, Mary, née Briggs. She was a pianist, organist and composer. She studied with Johann Bernhard Logier. After 1828 she became the organist at various London churches, serving at St Vedast Foster Lane for nearly fifty years. She also performed at concerts and as an accompanist.
In 1845 she performed as accompanist at the premiere of Hear My Prayer, the anthem by Felix Mendelssohn for soprano solo, chorus and organ, and in 1853 married its librettist, William Bartholomew (1793–1867). After her marriage she taught music in London and worked as a composer.
Bartholomew composed a large number of songs, part-songs, hymns and works for piano and organ. Selected compositions include: