Tattam was Rector of St Cuthbert's Bedford, 1822-1849, and from 1831 to 1849 also Rector of Great Woolstone, Buckinghamshire. He was Archdeacon of Bedford from 1845 to 1866, Rector of Stanford Rivers, Essex from 1849, and a Chaplain-in-Ordinary to the Queen from 1853.
Tattam was the author of various theological and philological works, including several editions and translations of Coptic texts. He was elected a Fellow of the Royal Society in 1835. Tattam visited Egypt and the Holy Land in 1838-9, meeting the patriarch and acquiring Coptic and Syriac manuscripts for the British Library. He received honorary degrees from Trinity College Dublin, the University of Göttingen and the University of Leiden.
Tattam in 1848 published the The Apostolical Constitutions, or Canons of the Apostles, which includes the so-called Alexandrine Sinodos (or Clementine Heptateuch) made of the Apostolic Church-Ordinance, the Egyptian Church Order and a free version of the eight book of the Apostolic Constitutions.
- Helps to Devotion, 1825
- Compendious Grammar of the Egyptian Language, 1830 (which was finally translated into Arabic by "Mina Saad Ibrahim" in 2010 under the title الشامل في قواعد اللغة القبطية )
- A Defence of the Church of England Against the Attacks of a Roman Catholic Priest, 1843
- Alllibone, S. A. A critical dictionary of English literature, p. 2337
- Boase, F., Modern English biography, 1898-1921
- Thompson Cooper, ‘Tattam, Henry (1788–1868)’, rev. Chris Pickford, Oxford Dictionary of National Biography, Oxford University Press, 2004. The first edition of this text is available as an article on Wikisource: "Tattam, Henry". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
- Henry Tattam, The Apostolical Constitutions, or Canons of the Apostles, London 1848
- "الشامل في قواعد اللغة القبطية". www.facebook.com. Retrieved 2015-10-30.
- Works by or about Henry Tattam in libraries (WorldCat catalog)
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