Defendants contend there was no evidence tending to prove manslaughter, and it was error to give such an instruction not based upon any evidence. They assert that if any crime was committed, it was wilful and deliberate murder and, therefore, it was error to give an instruction authorizing a verdict for a lesser offense. (People v. Schultz, 267 Ill. 147, 158, 107 N.E. 833 (1915).) In People v. Newman, 360 Ill. 226, 195 N.E. 645 (1935), it is said (p 231):