Original scan and caption by Rick Cox -

PHOTOGRAPHIC, PLAIN BACK, POSTCARD OF THE CRUISER HMS ENDYMION IN DRYDOCK - HAVING HAD ANTI TORPEDO BULGES FITTED FOR SERVICE IN THE DARDANELLES,2/1915 .... a scarce image.
HMS Endymion, built by Earle's, Hull (yard number 335) ,launched 22/7/1891. Sold for breaking up in Cardiff, 16/3/1020.
In February 1915, the Edgar, ENDYMION, Grafton, and Theseus were refitted as bombardment vessels for the Dardanelles. The ships were rearmed — their 9.2 inchers were traded for two more six inch guns — and fitted with bulges for increased underwater protection. Even after the Dardanelles campaign ended badly for Britain, the four ships remained in service for most of the war in the Mediterranean.
HMS Endymion, War Service
1914 10th Cruiser Squadron Northern Patrol.
February 1915 Rearmed and given anti-torpedo bulges.
1915 Dardanelles.
1917 Aegean.
1921 Sold for scrap

and additional photos