Emission line spectra of the Little Cub (black histogram) obtained using LRIS at Keck Observatory. The corresponding error spectrum is shown in blue. The upper and lower panels represent the data collected using the separate blue and red channels, respectively. The inset in the upper panel shows a zoom-in of the temperature-sensitive [O III] λ 4363 Å line, which is necessary for a direct oxygen abundance measurement. The inset in the lower panel shows a zoom-in of the weak [N II] λ 6584 Å line. A handful of emission lines that are used in our analysis are labeled.