RA Collection: People and Organisations
Originally formed in Manchester.
Vittore, Zanetti & Co 1801, Vittore Zanetti 1804, Vittore Zanetti & Co by 1804-1817, Zanetti & Agnew 1817-1826, Agnew & Zanetti 1828-1837, Thomas Agnew 1837-1850, Thomas Agnew & Sons 1850-1923, Thomas Agnew & Sons Ltd 1923 onwards
http://www.npg.org.uk/research/conservation/directory-of-british-framemakers/a.php#AG