The birth of 9 month old James has been registered in quarter 3 1840 Abingdon district as James Crutch Vol 6 page 118.
and 1 year old Eliza registered as Eliza Crutch Quarter 2 1840, Wallingford District Vol 6 page 255.
Added
Found Martin and Family in 1851 - it comes up in Berkshire because Abingdon is in Berkshire, although Stadhampton is in Oxfordshire.
Martin Cruch Head 67 (1784) Ag Lab b Ascott, Oxfordshire
Sarah Cruch Wife 57 (1794) b Aston Sandford, Buckinghamshire
Thomas Cruch Son Unmarried 36 (1815 ) Ag Lab Ascott, Oxfordshire
Edward Cruch Son Unmarried 22 (1829) Ag Lab b Stadhampton
Rachel Cruch Daughter 15 (1836) b Stadhampton
Also Edward and the other Priscilla:
Edward Cruch Head 44 (1807) Ag Lab b Milton, Oxfordshire
Priscilla Cruch Wife 44 1807 Ascott, Oxfordshire
Mary A Cruch Daughter 19 (1832 ) b Stadhampton
Jane Cruch Daughter 12 (1839) b Stadhampton
James Cruch Son 10 (1841) b Stadhampton
William Cruch Son 8 (1843 ) b Stadhampton
Joseph Cruch Son 5 (1846) b Stadhampton
Sarah Cruch Daughter 2 (1849 ) b Stadhampton
I can't find Martin on later censuses, but Edward is on 1861 and 1871. In 1861 he is widowed, living with him are Mary Ann, James, William, Joseph and Sarah (all unmarried) and two grandsons, Samuel 7 b Abingdon and Richard 1 b Stadhampton, both with Cruch surname, so could be illegitimate children of a daughter. Death registered of Priscilla Crutch Abingdon district Q3 1855.
Death reg of Martin Crutch in Q1 1857
In 1871, William and Sarah are still living with Edward and there are two additional grandchildren, George 6 and Ellen 2 both born Stadhampton. Samuel not with the family