Monadnock Summer Lyceum 25 Main St Peterborough, NH 03458 p 603.924.6245 f 603.924.8475 The office is on reduced hours due to Covid-19 and may be slow to respond to the phone or fax. The best way to reach us is to use the contact form below... Your Name Your Email Subject Message CAPTCHA This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. Send message