Athos Timeline and Summary

Athos consoles his heartbroken son, Raoul.
Aramis and Porthos pop in for a visit, and Athos learns of Aramis's attempts to exchange one king for another.
Monsieur le Duc de Beaufort is the next visitor to Athos's home. He will soon be leaving to embark on a military campaign to Africa and wants to say good-bye.
Raoul immediately begs permission to serve as the duke's aide-de-camp. Athos is deeply upset because it's clear Raoul is going into this war with a death wish, but agrees to let Raoul go.
Athos accompanies his son to the coast so the two can spend some time together before Raoul's departure. Before they leave, however, they search out D'Artagnan to say their good-byes.
Athos and Raoul determine that D'Artagnan is heading to Cannes. Luckily, this is along the same route Athos and Raoul will be taking.
As they head to the coast, the two men fail to hear anything about D'Artagnan. Athos assumes D'Artagnan is being deliberately secretive while on a mission for the King.
A chance encounter with fishermen convinces Athos that D'Artagnan is on the island of Ste. Marguerite, escorting taking Philippe to a life of captivity.
Athos and Raoul head out to the island, where they catch up with D'Artagnan.
Athos meets Philippe and is sympathetic to the man's plight.
Back home, Athos sinks deeper and deeper into depression. He is waiting to die.
Athos waits until he is certain Raoul is dead, and then dies to rejoin his beloved son.