Did your gg grandmother marry a Linacre/Linacker? If so, at her marriage she is Mary Elizabeth Kimpton Ward, father Isaac Kimpton publican and the initial K is included in the marriage registration.This Mary Elizabeth Ward/Linacre never used the Kimpton name again (censuses, death 1923, gravestone).
What was Richard's occupation when Mary was baptised?Just looking at a Richard Layhe c17901841https://www.familysearch.org/ark:/61903/1:1:M7S3-Q331851 with Brother in law William Mellarshttps://www.familysearch.org/ark:/61903/1:1:SG6V-R941841 Mellars with Robert and Mary Layhehttps://www.familysearch.org/ark:/61903/1:1:M7S9-L6R