A love song from Anglesey in which the singer is at the window of his sweetheart complaining about the bitter weather outside and reflecting on the yearning he has when away from her. Titrwm Tatrwm is an onomatopoeic phrase for the knocking on the window, equivalent to say tip-tap. Published in 'Alawon Gwerin Môn' [Folk Songs from Anglesey] by Grace Gwyneddon Davies.