Bill Walker's personalised Christmas card 1926 (14x19 cm). Annotated "To Harry from Bill Walker. Featuring 12 photographs illustrating various aspects of Walker's paddle steamer travels on the Murray River. Accompanied by one duplicate card
Bill and Mollie Walker's personalised Christmas card 1927 (14x19 cm). Annotated on front cover "opal fields". Annotated inside "To Harry from Bill Walker". Featuring three photographs surrounded by the words 'Opal digging Central Australia'. Accompanied by one duplicate card