Birthdays
Lloyd Aspinwall
Turns 32 on this date
William McKee Dunn
Turns 52 on this date
Robert James Harlan
Turns 50 on this date
Ebon Clark Ingersoll
Turns 54 on this date
Jesse Lazear
Turns 62 on this date
Dr. Andrew Nebinger
Turns 47 on this date
Caleb Sipple Pennewill
Turns 35 on this date
Events
| Crime/Disasters | In Yorkshire, almost four hundred miners are killed in what is still England's worst colliery disaster | 12/12/1866 |
| Legal/Political | The second session of the 39th Congress is sitting in Washington, DC |
12/04/1866 to 12/19/1866 |