On NaN undefined NaN Jillaine Smith wrote on Knower-16: Anderson, in Great Migration series, indicates no further record for Sarah, daughter of Thomas Knore. What is your source that she was one of the wives of William Buckman?
https://books.google.com/books?id=mOgK8dM9qqUC&pg=PA114&lpg=PA114&dq=sarah+knower+and+william+bucknam&source=bl&ots=ZjCnecJLMj&sig=ACfU3U2FcZzYSrK3OpvJaEIPOC5FTfnaFQ&hl=en&sa=X&ved=2ahUKEwjR4c-7x9LxAhXZF1kFHZ6uCDc4FBDoATAIegQIBhAC#v=onepage&q=sarah%20knower%20and%20william%20bucknam&f=false