Britton encloses a memorandum [not attached]. She is working on Splachnobryum and finds that S. ligulifolium from Mexico is a Pottia very close to P. pellata; she asks if Prain can spare a specimen for comparison. She is exchanging 51 of Mitten's type species of Hokkeria, as listed by Paris Index, and would like to give Prain first choice of his desiderata in exchange for a list of 'W.I.' [West Indian] and 'C.A.' [Central American] species. Britton is leaving for Cuba for a five week trip to be with Professor Earle at Herradura. Attached is a list of desiderata from RGB Kew, which includes Hookeriopsis versicolor and seven species of Hookeria. Page 1 of 2.