From North Wales Chronicle: 20 Aug 1829 and later:
Dollar Fishery on the Coast of Ireland
  Three brothers of the name Henry, Edward and John Owen, of Holyhead, lately invented a diving bell, about the size of a churn [milk churns typically held 17 gallons] by which they can descend and remain for many hours in 15 fathom water, moving from place to place with considerable facility. With this simple apparatus, they lately proceeded to Donaghadee on the coast of Ireland, where the brig Enterprize was lost in 1802 [sic], when homeward bound from South America with a large quantity of specie in gold and silver on board. For the recovery of this valuable cargo they immediately commenced operations, and, at the first descent, the diver lit on the ship's bell, having the name of the vessel "Enterprize" engraved thereon, which he brought up with him. On this discovery, the divers returned with reaping hooks, with which they employed themselves for three succcessive days in cutting the seaweeds which had grown on and about the remains of the vessel: and, on the fourth day, they succeeded in discovering a number of Spanish dollars of the coinage of Charles III and Charles IV. Thus encouraged, they continued their gallant exertions from day to day which were rewarded by a considerable quantity of the same valuable coin. The three enterprising brothers were at Holyhead last week, displaying the fruit of their ingenuity and bravery and are now on their way back to those silver shores which have already afforded so fair a return for their labour, and from whence they hope still to reap a further and richer harvest. We heartily wish them that reward which their ability and exertion deserve.

3 Sep 1829:
On the second day that the intrepid divers were employed in their dangerous submarine labour of cutting away the sea weed with which the remains of the wreck or the Enterprize were covered, the man in the bell discovered a crab which took shelter in a fissure of rock. Into this fissure he thrust his arm, laid hold of the crab, and dragged him from his lurking place. Few of our readers require to be told, that it is the nature or the crab to retain most pertinaceously his hold of what ever he may get between his nippers when alarmed or irritated. In the present instance, the crab laid hold of a Spanish dollar, which, when dragged forth to light, he held in his claw, as if willing to try if bribe might be the means of recovering his liberty. His captor, however, shoved both the crab and the money into the capacious pocket of his fishing jacket, and immediately proceeded to examine the hole in the rock from whence he had dragged the crab, where, to his agreeable surprise, he found upwards of one hundred dollars. While the diver was thus employed, the crab took the opportunity to escape from the pocket to which he had been committed prisoner, and was seen by the diver at a very short distance, running along the bottom in quest of a new habitation, and still retaining his dollar in his fist alias claw. - We have seen some of the dollars recovered by these gallant brethren; they are generally coated with a black substance, which when removed exhibits the coinage perfectly fresh and entire.

25 Oct 1829:
We have now to add, that the Donaghadee men having within the last fortnight got a knowledge of what was going on, drove off the three intrepid strangers, and commenced attempting to get to the bottom of the business themselves, by means of a clumsy machine constructed in imitation of the diving bell constructed by the Welshmen. They have, however, had the mortification to find that cleverer fellows had been before them, for their bell has hitherto only brought up goodly cargoes of slutch, and one solitary bar of iron, which the Patlanders[slang for Irish] say "is indented from end to end with the mark of dollars", which gives them good hopes that a considerable quantity of specie remains behind. We leave them to realise these hopes as they best can.

Saunders's News-Letter, Friday 16 October 1829:
A letter from Donaghadee, of the 5th of October, gives the following particulars respecting the recovery of Spanish dollars from the Perseverance[sic] wreck. When the diving bell was constructed, no one was willing to use it; at last John Cornell, carpenter, Donaghadee offered his services; the first descent nothing obtained; but on the next descent, the diver observing a cavity of a rock, attempted to put his hand into it, but was prevented by the Ostracion (or trunk fish)[unlikely in Irish waters] guarding the portals of its silvery mansion; slew the monster, and took from the cave no less than 180 dollars.