The seabed at the northwestern tip of the West Mouse is strewn with thousands of slates which may be from this wreck. A large Admiralty-pattern anchor has also been reported.

Event and Historical Information:
The PHEONIX was a wooden sloop belonging to the port of Newry. In late September 1827, the sloop under the command of master Thomas Pevan, had been loaded with slates and, on 20th, had left Holyhead for the last leg of the voyage to its home port. The winds were fair for the sloop to almost reach Newry, but suddenly changed to the north. The sloop had no choice but to put back for the shelter of Holyhead Head. On entering Holyhead Bay, the wind backed to the southwest, and being unable to fetch the harbour, they again bore up, intending to shelter for the night under the land. In going through the race of the Carmels, the PHEONIX were pooped twice rendering the vessel unmanageable. The PHEONIX was eventually driven onto the West Mouse at 8 o'clock at night. The crew, 5 in number, got onto the rock and the vessel immediately sank. The crew remained on the rock all night, with the sea frequently breaking over them. At daylight, they were perceived by the crew of the Coast Guard at Cemaes. By strenuous pulling against a heavy sea, the lifeboat got near the rock at 9 o'clock. At this time the sea was breaking so heavily over the rock , the lifeboat was unable to make a final approach and had to return to the shore. By about 4 o'clock, the wind had moderated a little, and the lifeboat was able to bring the PHEONIX's crew to safety.

Sources include:
North Wales Chronicle,11 October 1827

Maritime Officer, RCAHMW, August 2010.