Baptism images for South Kelsey St Nicholas are available on FindMyPast but only transcriptions for St Mary.
Mildred Laming is interesting because there was a Milchah Laming baptised at Irby on Humber on 16th August 1753.
The image is not very clear but looks correct as does that for Mildred on the marriage.
Irby is 15-17 miles from the other two locations.
David
Extending on David's excellent finding, I note that according to your tree, at least one granddaughter was named "Mildred". This might be indicative that it was a family name/she was named after "Mylca" and "Mildred" was an alternative or interchangeable name.
It happened a lot, for example Ann and Nancy, Edmund and Edward.
Something to consider, perhaps
