Watters closed his notebook. “Thank you, Mrs Grant. That will be all for the present. I will interview your servants now.” “I expect you to arrest Robertson, Sergeant Watters.” Watters stood up. “I cannot arrest anybody without evidence, Mrs Grant, or merely because they may harbour a grudge.” Mrs Grant lifted her chin a fraction higher. “You will allow my husband’s murderer to escape because of a trifle?” “Like your husband, Mrs Grant, I will follow the letter of the law without fear or favour. I will follow where my enquiries take me, but rest assured, I will catch whoever murdered Mr Grant, and they will face justice.” Mrs Grant took a deep breath. “I have told you the name of the murderer, and I have told you why. I hope you know your duty.” Watters stepped away. “Thank you for y