Birthdays
William Augustus Hall
Turns 51 on this date
Irvin McDowell
Turns 48 on this date
John Brown Parker
Turns 50 on this date
George Philip Rhinehart
Turns 36 on this date
Thomas Lafayette Rosser
Turns 30 on this date
Henry Harrison Walker
Turns 34 on this date
Events
| Education/Culture | Second game in Philadelphia Athletics and Brooklyn Atlantic series ends with victory for the visitors. | 10/15/1866 |
| Religion/Philosophy | The Second Plenary Council Meeting of the U.S. Roman Catholic Church is meeting in Baltimore, Maryland. |
10/07/1866 to 10/21/1866 |