Jemima Metcalfe married afterwards to Henry Groome[note 3], a limen-draper of St Paul's, Covent Garden and who was also the Keeper of the Guildhall and a member of the Worshipful Company of Musicians.

[4][5] Mectalfe is said to have been the apprentice of Robert Jones (died in 1774), a wine merchant and East India Company director who became a member of Parliament for Huntingdon from 1754 to 1774.

Of his parliamentary career, Metcalfe left few records, each times voting on Pitt side including Richmond's fortifications plan along the southern coast of England (27 Feb 1786) and stood with him on the most debated Regency Bill of 1789.

Among his friends and acquaintances were the writers Samuel Johnson,[11] Frances Burney, the painter Sir Joshua Reynolds, the philosopher Jeremy Bentham and West India merchant and art collector Robert Fullarton Udny (1722–1802) of Teddington, Middlesex.

Metcalfe was mentioned with his associate and kinsman James Baker and Jesse Ramsden in the correspondence between Abraham Pilling[note 11] and Evan Nepean.