The city shall not be held liable on account of any claim for the death of any person or injuries to any person or damage to any property unless the person making such complaint or claiming such damages shall, within six (6) months after the time at which it is claimed such damages were inflicted upon such person or property, file with the city a written statement under oath, stating the nature and character of such damages or injuries, the extent of the same, the place where same happened, the circumstances under which same happened and the conditions causing same, with a detailed statement of each item of damages and the amount thereof, and if it be for personal injuries, giving a list of any witnesses known by affiant to have seen the accident.