Rear Admiral Albert P. Niblack, Commander, United States Patrol Squadrons Based on Gibraltar, to Vice Admiral William S. Sims, Commander, United States Naval Forces Operating in European Waters
CABLEGRAM RECEIVED: May: 01429 RLM
ORIGIN: Senafloat, Gibraltar. SER. No. 857.
CS 19 May.
857. During the night submarine chasers discovered enemy submarine base Sardinia Bay 12 miles North-East Gibraltar in Spanish territorial waters. Nelson returned forenoon leaving 2 divisionsto follow submarine working up coast. British motor launches are relieving them and force will sail to-morrow as soon as practicable after daylight. Their work here has forestalled an offensive against Gibraltar as they detected presence of 3 submarines in vicinity. Bombs were dropped but not effectively. Admiral Grant urgently suggests leaving 2 divisions to follow but am insisting sailing entire force shall be expedited. 15018 857.
Source Note: Cy, DNA, RG 45, Entry 520, Box 387.