Summary of the results from the Li I line‐profile analysis. The top left panel shows f(⁶Li) vs. T_eff: nondetections are shown by open circles and detections by filled circles. Note that the two detections are near the hotter end of the distribution. The top right panel is f(⁶Li) vs. total Li abundance, and no trend is seen here. The bottom left panel is the observed histogram of the values of f(⁶Li). The distribution is peaked sharply around f(⁶Li) = 0.00, with two positive detections. The continuous curves show two Gaussian distributions with σ = 0.02 and 0.03, respectively. The bottom right panel illustrates the positions of the program stars in the log g–T_eff plane (nondetections of ⁶Li are shown by open circles and detections by filled circles) with isochrones from Bergbush & VandenBerg (1992) shown as continuous curves. The ages are 14 and 18 Gyr, with the solid curve for [Fe/H] = −2.0 and the dashed curve for [Fe/H] = −1.3.