cover 1895 (24 Nov.), 2a. registered envelope size "J", used from Lamu to Ilmenau, bearing 8a blue used in combination with "on India" 2a. blue, tied by "LAMU/A/NO 24/95" squared circle cancellations; envelope backstamped Aden and Ilmenau; very rare; quadruple rate and 2 annas registration; Denhardt correspondence. S.G. 42, 52