Copy letter from an unknown correspondent, to Messrs Williams and Norgate 'A volume of Dr Lendenfeld's Monograph of the Horny Sponges, value £3 addressed to Dr Haeckel of the University of Jena was instrusted to your care on August 23rd and complaints of non-delivery have reached us. Be good enough to correspond with your agents at once & let us know where it is delayed & why it is delayed. We should be glad of an early answer as it is important to Dr Haechel to receive this volume'. 28 October 1889