Looking at freereg there are 18 Tuckfield baptisms 1800-1830 as follows
John & Sarah Upham 1801-1830
John & Mary Lewis 1815-1829
John & Jane? 1818-1824
George & Elizabeth 1826-1829
Let's suggest Sarah dies,John marries Mary who already has a son James then raised as Tuckfield.Just on my way out so no time to check further.