Ages from Th abundances. We have plotted the case 3 and case 4 results. In most cases, the two different scalings agree very well; the exception is HD 115444, which reflects the reality of our 0.05 dex observational errors in the rare earths. Also plotted is the average age derived by Westin et al. (2000) from HD 115444 and CS 22892−052.