The chairman of the board of directors of Xerxes Corp. wrote a signed letter to Pablo, the president, who is 68 years old and planned to retire at the end of the year. "The corporation will pay you a pension of $100,000 a year for life if you retire as planned, and agree not to take another job in this industry." Pablo replied, "I promise to do as you wish." Two years later, Xerxes Corp. stopped the pension payments. Pablo sues Xerxes Corp. for the current installment. May Pablo recover?