A change in the time of paying interest which gives the creditor some legal right not before possessed by him, is a consideration for a promise to extend the time of payment.1 A promise to pay interest semiannually, instead of annually, as provided for by the contract,2 or to pay at intervals of ninety days,3 or to pay monthly where the original contract provided for annual payments;4 giving an interest-bearing note in payment of interest due on a prior note;5 payment of interest in advance,6 or before it is due,7 are all valuable considerations.