"HENRY PENNY" MULREADY ADVERT (MA462b). A good used 1d Mulready wrapper (Stereo A243), some soiling, from London to Surrey cancelled red-brown M.C. and backstamped 26 JA 1841. Within is a very fine advert promoting his Metallic Paper Memorandum Books with "OPINIONS OF THE PRESS." which is printed bold and upright (not italic as MA462a) with underlined twice (The SG catalogue is in error in this respect and to be corrected). A RARE ADVERT WITH ONLY THE THREE USED EXAMPLES RECORDED TO DATE. (Ref 102495).