"Thank you for your help during our recent trips to London. Your extensive knowledge of the tourist attractions that you represent was invaluable to us for our task of updating the London "Guide du Routard". In particular we appreciated your rapid replies to our various requests for information and your availability, including taking us to see certain attractions, some of which did not previously appear in our Guide. Thanks to your contacts, you were able to help organise free visits to many attractions and your assistance in the general organization of the trip was most welcome."