Children of Abraham BUYS & Claartje SCHERMERHORN

The first 9 children (born before 1800) of Abraham BUYS and Claartje SCHERMERHORN appear to be well documented in the SCHERMERHORN books and other sources.

However, it appears they had also had Catherine, born 1802; Margaret, born 1804; Ryer born 1806 and Sarah born 1808.

I am interested in these last 4 children, but especially Margaret BUYS, alledgedly born 07 Jan 1804 and married to Hiram D PERKINS and later William HARDING. Can anyone provide documentation of her birth and/or baptism?

Thanks, Gladys