The similarity of the sounds――parish of the Rock, and parish of St. Roche,――may have occasioned a subsequent adoption of this saint: of whom it is stated, from the very scanty materials remaining to make out his life, that having left Montpellier, the place of his birth, to proceed on a pilgrimage to Rome, he encountered the plague at the city of Placentia; that not obtaining any assistance or human help, after that most dreadful disease had manifested itself on his person, he got into a wood where dogs miraculously afforded him all the aid in their power, after a manner suggested by the parable of Lazarus. Getting well, he bestowed on others in the town that help which had been refused to himself; and fully satisfied with this effort on behalf of humanity, he returned into France, and spent the remainder of his life in idleness and solitude. He is fervently adored, and his aid entreated, over France and Italy, as the individual to whom Almighty God has delegated the care and superintendence of all cutaneous complaints or exterior ulcers; and it is rather curious that throughout Cornwall a congeries of pimples is denominated a roach up to the present time. This parish measures 6,080 statute acres. Annual value of the Real Property, as £. _s._ _d._ returned to Parliament in 1815 3989 0 0 Poor Rate in 1831 577 17 0 Population, { in 1801, | in 1811, | in 1821, | in 1831, { 954 | 1161 | 1425 | 1630 giving an increase of 71 per cent. in 30 years. Present Rector, the Rev. Charles Lyne, presented by the Trustees in 1833. THE GEOLOGY, BY DR. BOASE. The grand geological feature of this interesting parish is the large mass of granular shorl rock, which towers above the adjacent country. It has all the appearance and form (so far as regards the mechanical structure of this mass) of a projecting tor of granite, such as commonly cap the most elevated hills in Cornwall: but a nearer examination shows that it is a compound of shorl and quartz. This rock is entirely surrounded by a felspathic slate, being about a mile distant from the granite. St. Mewan Beacon is an instance of another large tor of shorl rock, a notice of which was omitted under the head of St. Mewan; this rock differs however from that of Roach in having a base of compact crystalline quartz, throughout which the shorl is disseminated in various proportions. Its position is also different, for that rises immediately out of the granite. The southern part of Roach parish reposes on granite; the remainder on rocks of the porphyritic series. It corresponds in its geological structure with the parish of St. Dennis. RUAN LANIHORNE. HALS.