The rainfall chart here given shows that Cornwall lies for the most part in an area where from 40 to 60 inches are annually recorded, though a strip of the north coast from St Ives to Padstow and again from Boscastle to the northern limit of the county shows a fall of less than 40 inches. This is because the uplands have robbed the rainclouds of a considerable portion of their contents, and accordingly it is on these high moorlands that we find the greatest rainfall. Thus on the moors between Launceston and Bodmin from 60 to 80 inches fall, and even this latter figure is exceeded in the neighbourhood of Rough Tor and Brown Willy. From observations taken at the Royal Institution of Cornwall at Truro, from 1850 to 1881 it appears that the rainiest months are November and December, and next to them January and July; April and May are the least rainy. =13. People--Race, Dialect, Population.= The original population of Cornwall would seem to have been what is now commonly called Ivernian, the same as Iberian, the underlying race everywhere in Western Europe from the western isles of Scotland to Gibraltar. When the Romans invaded and conquered Spain, they found there already in the east the Celts and in the west the Iberians, and they designated the more or less fused population, Celtiberians. So in Cornwall, there was this dark-haired, dusky-skinned race, and the Brythons, Celts, of the people of the Dumnonii. There were extensive settlements by Irish in the Land's End district, the Lizard, and along the north coast, in 490-510, owing to the expulsion of the Ossorians and the Bairrche from their lands in Ireland. The Saxon also crossed the Tamar and peaceably settled in East Cornwall. The language spoken was Brythonic, akin to, and originally identical with Welsh and that spoken in Lower Brittany. It was distinct in some points from the Goidelic of Ireland, the Isle of Man, and the Highlands of Scotland. The main difference was that the _C_ in the latter became _P_ in the former. Thus _Ken_ or _Cen_ in such names as Kenmare and Ciaran would in Cornish become Penmare and Piran. In the reign of Edward I, Cornish was spoken in the south Hams of Devonshire, but in the sixteenth century it was dying out even in West Cornwall. Norden, writing in 1580, says: "Of late the Cornish men have much conformed themselves to the use of the English tongue, and their English is equal to the beste, especially in the eastern partes.... In the weste parte of the countrye, in the hundreds of Penwith and Kirrier, the Cornishe tongue is most in use amongste the inhabitants." At Menheniot about 1540 the Creed and the Lord's Prayer were first taught the people in English. In 1678, at Landewednack, the last Cornish sermon on record was preached. In the reign of George III (1777) died Dolly Pentreath, the last to speak the language.