From this on Free BMD it looks like 2 sets of siblings marrying
Marriages Sep 1900 (>99%)
~~~~~~~~
Cook Ada W.Ham 4a 47
Cook William James W. Ham 4a 47
Smith Alice W. Ham 4a 47
Smith Henry John W. Ham 4a 47
1901 has a William aged 22 and Alice Cook aged25 at 160 Rosebury Ave East Ham . no children
Henry J Smith aged 28 born Dury Lane 92 High St West ham with wife Ada aged 27 , no children