The first night we enjoyed clear skies. Having already taken calibration exposures during the day, we had time to watch the sunset from above the clouds and later even to see the faint glimmer of the milky way just before moonrise. For most of the night we performed a continual cycle of taking exposures, moving the telescope to point at our next target, and taking more exposures. This was until, suddenly, the humidity alarm went off. A cloud was passing over the telescope dome. We closed the protective mirror cover and then the telescope dome to protect the mirror from any condensation resulting from the humidity. The dome could be reopened after about 50 minutes, and we could continue observing undisturbed until sunrise. We left the telescope that morning having obtained many precious spectra towards of almost al of our planned sightlines. During the second night, clouds covered the Roque de los Muchachos and the telescope domes on the mountain remained closed. The night in the Isaac Newton Telescope control room was spent analysing earlier observations, working out theoretical speculations, and giving a tour of the INT to the students who had been scheduled to observe at the nearby William Herschell Telesope.