Despite living in a relatively remote area, Thomas was able to share his geological expertise with a range of people not only from Britain, but from across much of the northern hemisphere, thanks to the Chester Society for Natural Science, and its President Professor Thomas McKenny Hughes of Cambridge. The growth and efficiency of the railways expedited this intellectual exchange. Thomas also had the good fortune to be in the right place at the right time.
After the close of the fourth International Geological Congress, held in London, delegates visited a number of areas of particular interest to geologists of the time, including North Wales. This led to a fortuitous opportunity for Thomas:
Saturday the 22nd[September 1888] I have been asked by the committee of the Chichester Society of Natural Science to meet the members of the International Geological Congress at the Conversazione in the Town Hall, Chester, on the 24thinst. The International Congress met in London this year and as the members were to make an excursion into North Wales, passing through Chester en route. The Chester Society’s Conversazione was fixed so as to suit the visit of the foreigners. As I was asked to take as many specimens of my Bala fossils as possible, I have been busy all week in arranging a selection from my collection.
Thomas travelled to Chester with his wife Frances, taking the opportunity of meeting his elder son Thomas ‘Tommy’ en route at Wrexham station. They were to stay at the home of Mr. and Mrs. Shrubsole, Mr. Shrubsole being an official of the Chester Society.
During the afternoon Mr Shrubsole went to the Town Hall with Frances and myself, and after a look over the room, I began to unpack. Francis helped me and I met my old friend Mr Williams of Blaenau Ffestiniog in the hall and he kindly assisted me. I found my specimens in fine order, just as I packed them. This space allotted to me was close to the seats set apart for the foreigners in the Assembly Room. After arranging my collection, I went to see the collection of Llandeilo fossils which Mr Williams brought; it was upstairs in the Ante Room. I met in with several of my old friends in the room set apart for the microscopes such as Mr. Siddall, Mr Shepheard, Mister G R Griffith and others all of whom I introduced to Frances.
We had tea at Mr Shrubsole’s, and then got ready for the Conversazione. We found the room very full of people, ladies and gentlemen. We went to look at the microscopic objects, many of their most beautiful and curious. There were rock sections, diatoms, fresh water Polyzoa, the Cristatella and Plumatella being especially beautiful. We saw a beautiful rotifer too, and cilia vibrating round the mouth, gave the object the appearance of having wheels rotating round the mouth.
Thomas and Frances looked closely various exhibits of insects, stuffed birds, etc. and Thomas introduced his wife to a number of his friends and acquaintances from the Society. Soon the main events of the evening commenced.
We next went to the Assembly Room, and got near my fossils during the speeches by the Chairman Mr Walker and others. The mayor in his robes was on the platform, accompanied by some of the foreigners the Countess Grosvenor and her husband, Mr Wyndham, Secretary to Mr Balfour, the chief secretary of Ireland. Some of the foreigners spoke a little in English. Prof Capellini, rector of Bologna University was the first, and was followed by Dr Hicks, then Prof Szabo, Buda Pesth (sic) spoke, and prof Lapparent of Paris gave an address in French. Mr C. D. Walcott F.G.S. from Washington gave a short address, and then prof D.K. Von Zittel of Munich gave us a short address in which he praised English hospitality. The Bishop, Dr Stubbs, gave a short but amusing address, in which he said he was an old fossil, he hoped the impression he would leave on the coal measures would be a pleasant one.
Among the international geologists whom Thomas met that night, undoubtably the most interesting and significant was Charles Doolittle Walcott (1850 – 1927) Walcott was in 1888 a member of the US Geological Survey. He was to become its director in 1894, President of the Geological Society of America in 1901 and Secretary of the Smithsonian Institution in 1910. Walcott’s primary interest was in the fossils of the Cambrian era (immediately underlying the eras of Ruddy’s main interest).
After the speeches, Mr Griffiths bought Mr Walcott and introduced him to me, and several of the foreigners were examining my fossils. Dr. Frech of Halle University was highly interested and told me my collection was beautiful and interesting. Mr Walcott and he said they never saw such a series of the Orthisena. In the midst of our examination the lights were turned down for a magic lantern exhibit of photographic scenes. This is stopped further examination. Dr F and Mr W wished they could come here and go over my collection quietly, for it was so crowded in the room that it was impossible to do much. Mr Walcott knew my American friend Prof. Brownell of Syracuse, New York State.
Walcott’s most significant discovery came in 1909 -1910 when he discovered the fossils of the Burgess Shale in British Columbia, Canada. He continued examining this area until his death in 1927. The fossils preserved here are some of the oldest examples of the the preservation of soft parts of organisms, whose full significance was only realised long after Walcott’s death.