This is likely a mistake. Here's why:
* Timeline: Sir William Morton was a Scottish soldier active during the mid-1600s. The year 1664 was during the Second Anglo-Dutch War. While Morton was involved in various battles and campaigns, he wouldn't have been in a position to surrender a castle to Waller.
* Waller: Sir William Waller was a prominent English Parliamentarian general during the English Civil War (1642-1651). He died in 1668. He would not have been active in military operations in 1664.
It's possible that you're thinking of a different figure or a different event. If you can provide more information, I might be able to help you find the correct answer.