A high resolution optical spectral atlas for three very low-mass stars are provided, along with a high resolution observation of an atmospheric absorption calibrator. This is the data used to produce Figures 4-9 in the paper. These data were acquired with CASPEC on the ESO3.6m telescope. The FWHM resolution is 16km/s (eg. 0.043nm at 800nm), at a dispersion of 9km/s. Incomplete wavelength coverage produces inter-order gaps at wavelengths longer than 804.5nm.