Single-crystal Raman polarisation data is used to assign the complex spectrum of rhombic sulphur in terms of internal and external modes. The data is also used to put the assignments of the two low-frequency infrared-active modes b2 and e1 and the inactive b1 mode on a firmer basis. The depolarisation ratios for the two totally symmetric a1 modes are calculated from the single-crystal intensity data and their values are compared with the depolarisation ratios observed in carbon disulphide solution.