Robert arthur talbot gascoyne-cecil, 9th earl of salisbury (1830-1903). direct descendent of lord burghley queen elizabeth 1's chief minister. spelter bust inscribed salisbury to the front but to the reverse:-
act 54 george iii
i september 1878
5 inches high by 3 inches wide by 2 inches deep ( 12.5 cms by 7.5 cms by 5 cms).