Electron-emission distribution curves of ordered and disordered graphite surfaces excited by primary electrons of energies in the 30\char21{}100 eV range have been measured. The entire inelastic-loss and secondary-electronic-emission spectra were studied in order to examine correlations between bulk plasmon deexcitation and the structure above the ``zero'' peak in the secondary-electron-emission spectrum. Our measurements show that no correlation exists between the prominent structure at \ensuremath{\sim}17 eV in the secondary spectrum and the appearance of bulk plasmons in the loss spectrum, as a function of primary energy. These results indicate that plasmon deexcitation in graphite does not result in single-electron excitations that contribute to prominent features in the secondary-electron-emission spectrum with threshold kinetic energies at ${\mathit{E}}_{\mathrm{plasmon}}$-e (work function). It is suggested that structure in the low-energy secondary-electron emission originates from single-electron transitions induced by the primary-electron beam.