Oscillator strengths for P, Q and R rotational lines belonging to the (0, nu" = 0, 1) and (1, nu" = 0, 1) bands for the C-1 Pi-X-1 Sigma(+) system of HCl have been theoretically studied. The calculations have been performed by following the molecular quantum defect orbital methodology, which has earlier proved to yield accurate intensities for transitions involving Rydberg states in a variety of molecular species. The results appear to be in good accord with the available experimental values. Predictions of a number of unknown intensities have also been made. We expect that the present data might be of help in the interpretation of future experimental measurements. (c) 2008 Elsevier B.V. All rights reserved.