Hi Karen,
did a bit of research into the parents of Alfred and Herbert Webster and found the following:
Herbert Webster b. 1868 Atherstone, Warw.- father of Herbert Webster b. 1897
John Webster, b. 1852 Ashby, Leics - father of Alfred J Webster b. 1890
Census 1871 - RG 10, 3167, 130, 21
Living: Long Street, Atherstone
William Webster, b. 1824 , Warwickshire
Mary Webster, b. 1831, Leicestershire
JOHN WEBSTER, b. 1853, LEICESTERSHIRE
William Webster, b. 1856, Staffordshire
Thomas Webster, b. 1860, Leicestershire
Harriet Webster, b. 1864, Warwickshire
Arthur Webster, b. 1867, Warwickshire
HERBERT WEBSTER, b. 1869, WARWICKSHIRE
Mary Ann Webster, b. 1870, Warwickshire
So, looks like you were right - Alfred J and Herbert are cousins
Viv