I am also researching Samuel Wallis & Elizabeth Collings of Bisley. My involvement starts from here with thier daughter Mary who married Samuel Eckut (Eycott) in Leonard Stanley in 1751, and then on to the present day.

Going backwards I have made very little progress. Have indications of 1688 birth for Samuel - where did your 1690 come form? have nothing on his parents.

have indication of christening of Elizabeth 5/12/1692. Understand her parents Samuel Collings (b 1665) married Sarah Taylor (b 1669) on 19/10/1690 - all in Bisley.

Hope this is of some help. Will share anything else I have. Do you have any more?

Mick