Following the pattern of previous years the 11th symposium of the S.S.I.E.M. held in the beautiful sylvan surroundings of Sussex Univ­ ersity, concentrated on a relatively small section of the field of inborn errors. The subject chosen-Inborn Errors of Skin, Hair and Con­ nective Tissue, was a highly topical one. Intensive research during the last few years particularly on the structure and disorders of connective tissue has considerably advanced our knowledge on this subject. We believe that the range of diseases covered, and the depth in which they were discussed, made this meeting unique. The proceedings contain much original material and reference information which should make them an invaluable addition to the literature on metabolic disorders. The work involved is multi-disciplinary involving among others physicists, organic chemists, biochemists, clinical chemists, paedia­ tricians, physicians, geneticists and neurologists. The bringing together of workers of many disciplines to contribute to the particular subject under discussion at our Symposia has always been an important objective of the Society. In this case we were very fortunate in gathering together experts from all the fields mentioned above. In particular we were honoured that Professor A. Dorfman of Chicago could accept our invitation to give the second Milner Lecture. We were also privileged to have some excellent contributions from the research scientists on whom we must rely for our ultimate understanding of the diseases, and rational approach to treatment.