Hi Janet

Eleanor was baptised twice, 6th Jan 1804 at St Matthews Douglas, and 25th Dec 1804 St Mary Lambeth, presumably because her parents weren't married until June 1804.

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Marriage, from "London, England, Marriages and Banns, 1754-1921" on Ancestry:

Southwark, Newington St Mary, 1804, image 22

No 1310

Richard Grisbrook, bachelor, and Margaret Lowson, spinster, both of this parish, married by banns, 7th June 1804.

Richard signed his name.
Margaret gave her x mark.

In the presence of Robt Turtle and Mary Gallop (x mark)

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When John Gillson married Eleanor Grisbrook on 16th Aug 1828 at Southwark Christ Church, the witnesses were Robt Turtle and Amy Turtle.

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Hope this helps

Jean C