Same recommendation as for DSO.
Source: London Gazette
Date: 5 November 1915

'Chailak Dere 6 [to] 9/8/15. Dental Surgeon. Worked with unceasing zeal and energy practically without rest from 6/9 Aug in improvising and helping in the evacuation of the wounded, from the dressing station at the mouth of Chailak Dere and the clearing station near No 2 Post to the boats at improvised pier at mouth of Chailak Dere. Nearly all this time the work had to be carried out under fire, and on one occasion the dressing station in Chailak Dere was heavily shelled for an hour, many of the assistants and wounded being hit, and it is largely owing to Capt. Finn's efforts that those wounded lying our under fire were got to a place of greater .'
Source: London Gazette
Date: 29 October 1915