Andover Advertiser 1915
WORTHY OF MENTION – in the recent list of names mentioned in dispatches appears that of Major P. L. Holbrooke R.G. A. who also receives the D. S. O. honour. He is the son of Mrs Holbrooke, of Stoke House.
St Mary Bourne Goes To War
A Village In Rural Hampshire During World War One
St Mary Bourne Goes To War 
Until 1943, in order to be apppointed DSO, it was a requirement to first be Mentioned in Despatches, so it’s likely that both honours were for the same act
Thank-you, David