" 
 :::Oh really, that's v interesting. I've done a quick search at the only place I can think of where baptism records are readily available - http://www.familysearch.org - and disappointingly drawn a blank.  Going back to the birth registrations it seems that his parents/uncles/aunts were not so restrained when registering later children - there is a Mabel H. E. H. B. B. E. V de L. de O. P. T. S. Tollemache regsitered in Grantham Q2 1872 and a Lyulph Ydwallo O. N. E. L. T. H. E. S. E. C. N. D. P Tollemache Q4 1876, also in Grantham. Extraordinary!  "