Letter from [Marc-Auguste] Pictet, Geneva, to 'My dear Sir' [Henry Kater] Pictet gives thanks for an interesting communication, including a performance by Mrs Parkins. He intends to publish an abstract of the paper in the Bibliotheque Universalle that month; 'it will please all the lovers of accuracy'. He notes the labours in France and England to procure accurate linear measurements; reciprocal arrangements would have been useless had Pictet not procured from [Edward] Troughton the facsimile of one of the standards for comparison with the standard metre. He concludes by hoping that Kater will visit 'our lakes and our alps'. 3 July 1821