Catherine helped me create what seems to be an error-free thesis. My supervisors have yet to find even a typo, and they have not pointed out any grammatical errors. Her notes were clear and always on target. I have a PhD in Chemical Engineering, I have 3 years in writing, but Catherine found things I totally missed in my own correction and helped me arrange all the figures, tables and references. In addition, she always completed proofreading on time. Thank you, Catherine.