Hi Phil!
The International Genealogical Index (
www.familysearch.org) shows that James Thomas Spackman was christened on 16th May 1847 at All Souls, Saint Marylebone,London, having been born on 19th April 1847. He was the son of William and Jemima Spackman.
The IGI also has records for 6 more children of William and Jemima, all christened at
All Souls, Marylebone:
Henry Born 18th Sept 1844 Christened 20th Oct 1844
George Born 28th Dec 1849 Christened 28th Jan 1849
Frederick Born 12th Mar 1851 Christened 13th July 1851
Caroline Ann Born 15th April 1853 Christened 10th July 1853
Jemima Elizabeth Born 9th Jan 1829 Christened 2nd Nov 1859
Rebecca Ann Born 19th April 1862 Christened 20th July1862
I think the date of birth for Jemima should be 1859!
Also, in case you haven't seen this, it shows that James Spackman married Matilda Grainge on 31st Oct 1870 at Old Church, Saint Pancras.
Hope this helps!
Ju