Within 18 months of their arrival in South Australia in 1838, the missionaries had produced a definitive vocabulary of about 2, 000 Kaurna words, around 200 translated sentences and key elements of grammar.
The two key challenges related to what can appear to some Europeans an extreme system in the US. Prisoners can get life sentences without any possibility of parole - the five men facing extradition in this case would not face the death penalty.