MUMBAI: A teenaged schoolboy who had penned a ‘goodbye note’ and left his Goregaon home after an argument with his mother was rescued near a lake at Aarey Colony by policemen on Friday. The 15-year-old had already attempted to drown himself once, police said. The boy’s father, a banker, has written a letter of appreciation to the police commissioner, Sanjay Pandey, expressing gratitude to the police team that rescued his son. On Friday, the teen had an argument with his mother over pending homework assignments. Around 5.30pm, he left home after writing a farewell note to his parents and letters addressed to his friends, which said he would meet them “once they grew old”. When his parents found the notes, they panicked. Around 7pm, the father approached Vanrai police station.