‘Tropical ulcers’ are not the same as the veldt sore, desert sore, Barcoo rot, Castellani's ulcer, tropicaloid ulcer, sickle cell ulcer, Buruli ulcer, or myobacterial ulcer.
Barcoo gave us Barcoo rot for a form of scurvy and the Darling River gave us Darling shower for a dust storm.
There would not be too much Barcoo rot on this journey, and not too many would need to be carried on a stretcher like the explorer Stuart 140 years before.