"full of renewed enthusiasm" that this particular formulation would help him bring his seizures under control. Throughout 1979 and 1980, Curtis's condition gradually worsened amid the pressure of performances and touring, with his seizures becoming more frequent and more intense. Following his diagnosis, Curtis continued to drink, smoke and maintain an irregular sleeping pattern—against the advice given to those with the condition. The medications Curtis was prescribed for his condition produced numerous side effects, including extreme mood swings. This change in personality was also observed by Curtis's wife, family and in-laws, who noted how taciturn he had become in his wife's company. Following the birth of his daughter in April 1979, because of the severity of his medical condition, Ian was seldom able to hold his baby daughter in case he compromised the child's safety. At the time of the recording of the band's second album, Curtis's condition was particularly severe, with him enduring a weekly average of two tonic-clonic seizures. On one occasion during these recordings, Curtis's bandmates became concerned when they noted he had been absent from the recording studio for two hours. The band's bassist, Peter Hook, discovered Curtis unconscious on the floor of the studio's toilets, having hit his head on a sink following a seizure. Despite instances such as this, Hook stated that, largely through ignorance of the condition, he, Sumner and Morris did not know how to help. Nonetheless, Hook was adamant that Curtis never wanted to upset or concern his bandmates, and would "tell [us] what [we] wanted to hear" if they expressed any concern as to his condition. In one incident, at a concert held before almost 3,000 people at the Rainbow in Finsbury Park in April 1980, the lighting technicians at the venue—contrary to instructions given to them by Rob Gretton prior to the gig—switched on strobe lights midway through Joy Division's performance, causing Curtis to almost immediately stagger backwards and collapse against Stephen Morris's drum kit in the throes of an evident seizure. He had to be carried offstage to the band's dressing room to recuperate. When Curtis had recovered from this first seizure, he was adamant the band travel to West Hampstead to honour their commitment to perform their second gig of the evening at this location, although some 25 minutes into this second gig, Curtis's "dancing started to lose its rhythmic sense and change into something else entirely"