Roy,

Lord Google suggests that it may be Henry William Macrosty, president  
of the RSS.
The JRSS obituary for H.W.M. is here:

H. W. M.
Journal of the Royal Statistical Society, Vol. 104, No. 1 (1941), pp.  
85-90
Publisher: Blackwell Publishing for the Royal Statistical Society
Stable URL: http://www.jstor.org/stable/2980270

Tim Leonard