Bircham Tofts is northeast of King's Lynn. You can see the images of the Bircham Tofts January 7, 1827, baptism of William Parsons Easter, son of John (labourer) and Sophia, and the marriage of his parents, John Easter and Sophia Bobbin (not Boltin), at LDS Family Search. Scroll down to browse images and choose, United Kingdom, then England Norfolk Bishop's Transcripts 1685-1941, Archdeaconry of Norfolk: for baptism, choose 1827 and go to initial B, for Bircham, image 139; for the marriage, choose 1826, initial B, image 146.
Other people are researching this Easter family. Google John Easter and Sophia Bobbin Norfolk to find more info. John and Sophia apparently had at least 9 children. I found Sophia's baptism on FreeReg at Rootsweb. She was baptised May 25, 1806, St. Peter and St. Andrew, Great Ringstead, Norfolk, born April 15, 1806...parents Henry Bobbin and Elizabeth Parsons. (Parsons is the middle name of the William Easter who was baptised January 7, 1827, at Bircham Tofts.)