In 1901 Henry Morgan was living in Sculcoates with his parents, so it's probably reasonable to assume the marriage was in Hull
1901  -  RG13/4482/135/46
William Morgan    Head  Mar  48  Dock labourer  Sussex, Battle
Amelia Morgan    Wife  Mar  45  Surrey,  ??
Charlie Morgan    Son  S  24  Bricklayer  Sussex
William Morgan  Son  S  19  Dock labourer  Sussex, Petworth
Henry Morgan  Son  S  18  Checker Railway  Sussex, Petworth
Ainsled? Morgan Dau  S  17  Sussex, Petworth
Ellen Morgan  Dau  S  15  ?? knitter   Sussex, Petworth
Harold Armstrong Morgan  Son  12  Sussex, Portslade
Myrtle T Morgan  Dau  8  Yorks, Hull
Frank Morgan  Son  6  Yorks, Hull
Linda