It is of absorbing sociological and psychological interest,  says Verrier Elwin, ‘to study the reasons that drive unsophisticated primitive men to kill and wound their fellows.’ In this book, after a brief sketch of Maria life and custom, the author examines the records of one hundred cases of murder and fifty cases of suicide, and finally makes valuable suggestions for improving the treatment of aboriginal criminal Inn jail. The commonest motives for crime among the Bison-horn Maria are sexual jealousy and resentment or shame caused by public rebuke, but drunkenness and fatigue weaken self-control and also lead to murder sometimes.