One final posting of readable Circular Postmarks showing date and enough of the town name to identify the post office.

(postmark device) A RIVIERE DU REMPART 11MY04

(postmark device) A RIVIERE DES ANGUILLES 15FE04

BLACK RIVER 30DE06

CLARENS 21JA04

(postmark device) A MAHEBOURG 31DE01

(postmark device) 3 MAURITIUS 040C98

GRAND RETRAITE 11NO?? (This is a challenge. I am reporting what I think I see. No year appears in the postmark)

(postmark device) C ROSE HILL 28AU11