But the results of digging to which I have referred are, as I have already said, the results merely of accidental digging. From a systematised application of the same means of discovery, in fit and proper localities, with or without previous ground-probing, Archaeology is certainly entitled to expect most valuable consequences. The spade and pickaxe are become as indispensable aids in some forms of archaeological, as the hammer is in some forms of geological research. The great antiquarian treasures garnered up in our sepulchral barrows and olden kistvaen cemeteries, are only to be recovered to antiquarian science by digging, and by digging, too, of the most careful and methodised kind. For in such excavations it is a matter of moment to note accurately every possible separate fact as to the position, state, etc., of all the objects exposed; as well as to search for, handle, and gather these objects most carefully. In excavating, some years ago, a large barrow in the Phoenix Park at Dublin, two entire skeletons were discovered within the chamber of the stone cromlech which formed the centre of the sepulchral mound. A flint knife, a flint arrow-head, and a small fibula of bone were found among the rubbish, along with some cinerary urns; but no bronze or other metallic implements. The human beings buried there had lived in the so-called Stone Period of the Danish archaeologists. Some hard bodies were observed immediately below the head of one of the skeletons, and by very cautious and careful picking away of the surrounding earth, there was traced around the neck of each a complete necklace formed of the small sea-shells of the Nerita, with a perforation in each shell to admit of a string composed of vegetable fibres being passed through them. Without due vigilance how readily might these interesting relics have been overlooked!