During the longest period black for one month, half-mourning for one month.
During the shortest period black for one month.
For a First Cousin the longest period is six weeks, the shortest one month.
During the longest period black for three weeks, half-mourning for three weeks.
During the shortest period black for one month.
For a Second Cousin three weeks black. Mourning for a second cousin is not obligatory, but quite optional, and often not worn.
For a Husband's Relations the periods of mourning chosen are invariably the shorter ones.