It was already dark, and the obscurity would permit them to ascertain if flames or incandescent matter thrown up by the volcano were mingled with the vapor and smoke accumulated at the mouth of the crater.
La oscuridad era profunda y debía permitir a los colonos reconocer si, con los vapores y el humo acumulados en la boca del cráter, se mezclaban llamas o materias incandescentes proyectadas por el volcán.