From June, 1809, the British squadron in the Indian Ocean commenced to blockade Ile-de-France.* (* Flinders to Banks, Historical Records 7 202.) Decaen's fear of Flinders' knowledge is revealed in the fact that he ordered him not for the future to go beyond the lands attached to Madame D'Arifat's habitation. Flinders wrote complying, and henceforth declined invitations beyond the immediate neighbourhood of the plantation. He amused himself by teaching mathematics and the principles of navigation to the two younger sons of the family, and by the study of French literature.