maybe
UK, Outward Passenger Lists, 1890-1960
Name:Donald Darling
Gender:Male
Age:41 Vice Consul
Birth Date:abt 1905
Departure Date:11 Jul 1946 ****
Port of Departure:Liverpool, England
Destination Port:Rio De Janeiro, Brazil
Ship Name:Loch Ryan
Shipping line:Royal Mail Lines Limited
Official Number:164863
Master:B C Dodds O B E
UK, Incoming Passenger Lists, 1878-1960
Name:Donald Robt Darling
Birth Date:abt 1905
Age:44
Port of Departure:La Plata, Argentina
Arrival Date:23 Sep 1949 *****
Port of Arrival:London, England
Ports of Voyage:La Plata
[Montevideo]
[Santos]
[Rio de Janeiro]
Ship Name:Highland Princess
Shipping line:Royal Mail Lines Ltd
Official Number:161859
Foreign Services
address Roschill Point, Oswerey, Salop??
UK, Incoming Passenger Lists, 1878-1960
about Robert Donald Darling
Name:Robert Donald Darling
Birth Date:abt 1906
Age:47
Port of Departure:Buenos Aires, Argentina
Arrival Date:1 Jan 1953 *****
Port of Arrival:London, England
Ports of Voyage:Buenos Aires
[Montevideo]
[Santos]
[Rio de Janeiro]
Ship Name:Highland Monarch
Shipping line:Royal Mail Lines Ltd
Official Number:148158
occupation: Vice Consul to Brasil
several other trips as well