For an Uncle or Aunt the longest period of mourning is three months, the shortest period six weeks.
During the longest period black (no crape) should be worn for two months, half-mourning one month.
During the shortest period black for three weeks, half-mourning for three weeks; diamonds after three weeks.
For a Nephew or Niece the periods of mourning are identical with the foregoing.
For an Uncle or Aunt by Marriage the period is six weeks black, or three weeks black and three weeks half-mourning.
For a Great Uncle or Aunt the longest period is two months, the shortest one month.