Penal Code, 1860–Sec. 302–Conviction–Circumstantial evidence–Murder of wife–Clinching evidence up to effect that the appellant killed the deceased– Both were last seen by the witnesses when they went to sleep in their room–Relations were strained between the couple–Cause of death was asphyxia due to strangulation–No explanation by appellant u/s. 106 of Evidence Act–Held, the prosecution proved the case beyond a reasonable doubt–Conviction was justified.