The 1837 could have been the first calling of banns and no more followed as someone objected

Familysearch has
William Elton Barnes
Principal
England and Wales, Marriage Registration Index, 1837-2005
Marriage 1840
Tewkesbury, Gloucestershire, England
William Elton Barnes
Principal
England Marriages, 1538–1973
Marriage Notice 31 May 1840 Tewkesbury, Gloucestershire, England, United Kingdom
Spouses Harriet Devereux
William Elton Barnes
Principal
England Marriages, 1538–1973
Marriage Notice 9 April 1837 Tewkesbury, Gloucestershire, England, United Kingdom
Spouses Harriet Devereux
William Elton Barnes
Principal
England Marriages, 1538–1973
Marriage 5 July 1840
Tewkesbury, Gloucestershire, England, United Kingdom
Spouses Harriet Devereux