Query: What was Donaldson's role within the Royal Institute?
Context: The design of the Institute's Mycenean lions medal and the motto ‘Usui civium, decori urbium' has been attributed to Thomas Leverton Donaldson, who had been honorary secretary until 1839. The RIBA Guide to its Archive and History (Angela Mace,1986) records that the first official version of this badge was used as a bookplate for the Institute's library and publications from 1835 to 1891, when it was redesigned by J.H.Metcalfe.