The Rev. H. Fleetwood Sheppard and I next penetrated to the very heart of Dartmoor, and saw Jonas Coaker, an Old blind man, Of 89 years, very infirm, and only able to leave his bed for a few hours in the day. He is, however, endowed with a remarkable memory. From him, and helped by Mr. Webb, captain Of a tin mine, hard by, who could recall and very sweetly sing the Old melodies, we gleaned several important and interesting songs, with their traditional airs.