However.... there are people sailing from India and Burma which were also under British rule.... as well there are listings for Mrs Walden, and Walden's with only a first initial given.
And... there are people who were departing Malta IE the following person listing last permanent residence as Malta
Name: Grace Waldron
Birth Date: abt 1898
Port of Departure: Calcutta, India
Arrival Date: 26 Aug 1923
Port of Arrival: London, England
Ports of Voyage: Calcutta
Ship Name: Matiana
She was traveling with her daughter Audrey Grace (no age listed) and her residence in UK as Ruskin House, Goldsmith Av, Southsea.
As you can see...... having Grace and William's birthdates would help... this is like shooting in the dark with such scant info..