A long analysis of Cogan's writings is in Jared Sparks's ‘Collection of Essays and Tracts in Theology’ (1824), which also contains (pp. 237–362) a reprint of his Letters to William Wilberforce on the doctrine of Hereditary Depravity, by a Layman (pseud. i.e. T. Cogan), in which he denounced the view supported by William Wilberforce in his Practical View of the prevailing Religious Systems of Professed Christians, and argued for the happiness of all mankind.
In 1823 Jared Sparks published at Boston, U.S., a selection from Emlyn's works, with memoir.
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