(British) Army List - 30 June 1906
Page 837 lists the date of birth and appointments of Edward Hoare REEVES as follows
Date of Birth 2 April 1875
First appointed as a 2nd Lieutenant in the West India Regiment, transferring from the Militia on 23 February 1898.
Promoted to Lieutenant in the West India Regiment on 16 November 1898.
Transferred to the 1st (King's) Dragoon Guards, retaining his rank of Lieutenant on 05 May 1900.
Promoted to Captain of the 7th (Princess Royal's) Dragoon Guards on 5 March 1904.
Page 1404 confirms his current position as Captain in the 7th (Princess Royal's) Dragoon Guards