From Joseph Cooper   22 December 1830

Sir

By the desire of W. ^m Upton I have sent you a specimen each of the Nepal Cypripedium also one of the charming Zygopetalum Mackaii – the others I have added. the solitary flower is a darker variety of Zygopetalum Mackaii of which I could not at present send a specimen – It appears somewhat singular that the dark var. is never fragrant at any period of the day or night, whilst the fine light coloured one is remarkable (sic) fragrant at all times, it is very possible you can account for it

I am Sir | your Obedient Servant | Joseph Cooper