Hello,
This information was given to me by another descendant. She has researched a lot about the Tapper family. I hope this is helpful.
JOSEPH JOHN TAPPER born c.1818: Blandford, Dorset
Baptised 23 SEPT 1818: Independent, Blandford Forum, Dorset
Census: 1841: JOSEPH TAPPER 20, ag lab: with widowed mother as above
JOSEPH JOHN married 1 OCT 1846: Bryanston Parish Church: CERTIFICATE
ELIZA MELMOTH born c.1821: Durweston, Dorset
Dau of HENRY MELMOTH & CHRISTIAN(A) MEADER
Marriage Witnesses: ? EDWIN TAPPER, CATHERINE ROGERS & JOHN KEARLEY: Marriage Regd: DEC Qtr 1846: Blandford: V8.P21
At marriage: both of full age: JOSEPH bachelor, labourer of Stourpaine & ELIZA spinster of Bryanston, Dorset
JOSEPH JOHN TAPPER 1818-1887 & ELIZA MELMOTH 1821-1892
JOSEPH TAPPER married 1 OCT 1846: Bryanston Parish Church, Blandford, Dorset
Marriage Regd: DEC Qtr 1846: Blandford: V8.P21
CERTIFICATE ELIZA MELMOTH born c.1821: Durweston, Blandford, Dorset
Baptised 8 MARCH 1821: St Nicholas, Durweston (DRC: Durweston Baptisms – daughter of HENRY MELMOTH / MELMER & CHRISTIAN(A) nee MEADER
Census: 1851: HO-107/1853/ED16/F479/P11/H39: GSU 221000: JOSEPH TAPPER 38, agric labourer & wife ELIZA 30 + 2 children: living at Tarrant Monkton, Blandford, Dorset
1861: RG9/1334/ED12/F80/P16/H84: GSU 542797: JOSEPH TAPPER 43, woodman & wife ELIZA 40 + 5 children: living at Tarrant Monkton, Blandford, Dorset
1871: RG10/1979/ED12/F80/P18/H92: GSU 830878: JOSEPH J TAPPER 53, woodman & wife ELIZA 50 + 3 children: living at Tarrant Monkton, Blandford, Dorset
1881: RG11/2089/ED12/F80/P19/H89: GSU 1341504: JOSEPH TAPPER 63, woodman & wife ELIZA 60 + 2 children: living at Tarrant Monkton, Blandford, Dorset
JOSEPH died aged 69: 25 APRIL 1887: Tarrant Monkton: CERTIFICATE
Causes: pneumonia 6 days & exhaustion 24 hours: HENRY TAPPER present
Death Regd: JUNE Qtr 1887: Blandford: V5a.P157
1891: RG12/1634/ED13/F176/P8/H47: GSU 6096744: ELIZA TAPPER 70, widow: living with son HENRY at Tarrant Monkton as below
ELIZA died aged 70: 14 FEB 1892: Tarrant Monkton: CERTIFICATE
Causes: pleurisy 6 days & senile debility: HENRY TAPPER present
Death Regd: MAR Qtr 1892: Blandford: V5a.P213
JOSEPH & ELIZA TAPPER buried at All Saints, Tarrant Monkton
I do not have any more information about Eliza's parents.