Supplementary to 'Visit to Bentinck and Mornington Islands, Queensland by Norman B. Tindale. 1960' (AA 338/1/23)
'Old William showing leavering action of tjilka stick after hitting oyster with mariwu
Weredjara W side Mornington I. Qu.
NB Tindale 4 June 1960
NBT. journ. p. 309'