Art. 1278.  Time and security for payment.

This heir shall have one year to pay the sum thus by him due, if he furnish his coheirs with his obligation payable at that time, with eight per cent.  interest, and give a special mortgage to secure the payment thereof, either on the immovable property subject to the collation, if it is in his possession, or in want thereof, on some other immovable property which may suit the coheirs.