Dietary, Thursday May 28. Left Bwlfrille at 9.30 and got to Middle- ton at 10.45. Staying at the American House. After dinner took the train back to Dietany 4 miles and then walked north-east to Tor Brook. The iron mines are around Tor Brook but they are all shut down now. On the clumps we saw con- siderable quantity fossils in the "shale". Spiriferas are very common, and the largest among them is S. arenaeus. The variety is also not large. The ore is a very fine grained flax- sand or like that of the Clinton. The iron runs 25 to 30%. The bed is said to range from 3 feet to 4'6". At his man slive grew much squeezed slate in which near to we see as a few more Spiriferas. These slates are like those of the Llynfiand. All of the tracks, beds are simple valves and some show washing together. Saw one species of a Trepro- tomita, please as if Stonal onustus. The strata lie in a syncline. Tor Brook is on the eastern limb ad Dietany in the western. The syncline may have a width 10 or miles.