Definition of "sollicitous"

For the Minister of Justice who have hitherto lived in India, through their obscure and damnable blindness, were not much sollicitous about the punishment of the Crimes and Butcheries which have been and are still committed by these Tyrants, only they may say possibly because such a one, and such a one hath wickedly and barbarously dealt with the Indians, that is the reason so great a summ of Crowns in Money is diminished already or retrenched from His Majesties Annual Revenue, and this general and confused proof is sufficient (as they worthily conceive) to purge or repress such great and hainous Crimes.

1689, Bartolome de las Casas, A Brief Account of the Destruction of the Indies‎