I attended the Sennett Estate Primary School along Kwong Ave in Sennett Estate. I remember there was an Alkaff Lake in the area, at one time a picnic area for couples. There were talks of the "oily man" there, and the place soon became deserted. (Memory collected at the Ang Mo Kio Public Library during "The Singapore Story: My Heart, My Hope, My Home" campaign from 6 Sep to 31 Dec 2012)