A. P. de Silva, longtime friend and former supervisor of Thorri, and professor at Queen’s University of Belfast, gave a lecture about his work on “Fluorescent sensing and logic systems” today for the first DU Werner Chemical Society talk of the year. Group members Hannah and Isabel – who are also committee members of the Society – helped organise the talk. A. P.’s work on fluorescent sensors has developed into a range of blood gas and electrolyte analysers, sales of which by Roche, OPTI Medical (for human health case) and IDEXX (for animal use) have surpassed $530 million, and saved countless lives. As always, it was both a pleasure and an honour to have A. P. as a guest at Trinity and an enjoyable and unique experience to participate to one of his talks. Looking forward to the next time!