Acknowledgements
We would like to thank the UKST unit for both taking and providing access to the survey plates used in this project. We thank the Las Campanas Observatory staff for their help during this project. We would also like to thank the referee for carefully reading the original manuscript and for suggesting several improvements to it and for alerting us to the Morgan and Hatzidimitriou paper. This project was supported financially, in part, by the Natural Sciences and Engineering Research Council of Canada, (S.D.) and the Particle Physics and Astronomy Research Council of the UK (M.J.I.).