  Resonant Raman spectra of single layer WS$_{2}$ flakes are presented. A
second order Raman peak (2LA) appears under resonant excitation with a
separation from the E$^{1}_{2g}$ mode of only $4$cm$^{-1}$. Depending on the
intensity ratio and the respective line widths of these two peaks, any analysis
which neglects the presence of the 2LA mode can lead to an inaccurate
estimation of the position of the E$^{1}_{2g}$ mode, leading to a potentially
incorrect assignment for the number of layers. Our results show that the
intensity of the 2LA mode strongly depends on the angle between the linear
polarization of the excitation and detection, a parameter which is neglected in
many Raman studies.
