A directory entry records an identity. It is not, on its own, evidence of a connection to any Item; each association cites its own source.
2006
6 May 1840
Source: Robert A. Siegel: Penny Black first-day cover, sale 913, lot 1018
2013
4 October 1852
Source: Robert A. Siegel: Dawson Cover, sale 1045, lot 11