The Lincolnshire FHS has a Loan Library service which has the parish registers on microfiche for Baptisms from 1686 to 1812 and Marriages from 1686 to 1809.
George E. COKAYNE's book, "Lincolnshire Parish Registers and Monumental Inscriptions, ca. 1500-1837", vol. 2, has some parish register entries back to 1544. The book has been microfilmed as is available through Family History Centres.
The LFHS has published several indexes for the Lafford Deanery to make your search easier.
Aunsby is a both a parish and a village of the same name which lies about 9 miles east of Grantham and 5 miles south of Sleaford. Dembleby parish lies to the south and Aswarby parish to the east. The parish covers about 1,200 acres.
If you are planning a visit:
The village lies about a mile west of the A15 trunk road and about a mile north off of the A52 where the two roads cross south of Sleaford.
Pamela FARRINGTON-GRANTLEY has a photograph of the village sign on Geo-graph, taken in January, 2007.
The name derives from the Old Scandinavian Authunn+by or "farmstead of a man called Authunn," and is listed in the 1086 Domesday Book as Ounesbi and in 1281 as Outhenby. [A. D. Mills, "A Dictionary of English Place-Names," Oxford University Press, 1991]