Page (2) Son writt April 10th Feje. In the Hatington slate quarry we are again impressed with the cycles of deposition. There are gyres 15 to 20 feet apart in which none of the black shale gyres appear. Between these are other gyres 10 to 20 feet across with the black shale gyres. In one place the black shale gyres may be regularly 4 to 6 inches apart with the black shale from 1 to 2 inches thick; in others they are from 12 to 18 inches or even further apart with the black shale bands 1 to 3 inches thick. In the regulatum shale one sees or bedding within are the black shale then is distinctly a series of them banding. Usually the black gyres start in bedding with a fine ferruginous sand layer from a 1/8 inch to 1/2 inch thick that gradually gives way to the black shale in which there may be one more gyre (1/16 to 1/8) of regulatum shale. Once in a while a sandy layer cuts into the shale due to some action. In one case we saw an 18" layer of sand sharp on the shale that soon became rippled and was bedded with the casts four inches apart. Most all of the iron- fayolite is in the black shale. What are these confirming that cycles of black (foul bottoms) shale due to? Climatic seems to be line of implication. If so the rhythms is only regular and yet there is a certain regularity present. Can the floor steps be representations of drain times, low deposition and more contraction and less oxygenated bottom?