There are two volumes to this Chronicle. Vol.1 deals with secular history and Volume 2 deals with ecclesiastical history.
Abouna, A. (trans.) (1974) Anonymi Auctoris Chronicon Ad A.C. 1234 Pertinens vol. II -
French translation - can be borrowed with a free account at archive.org
Chabot (1916) Both Volumes in Syriac with a Preface in Latin - bookmarked to the start of the secular section -
note that pagination for this text is right to left - open access at archive.org
Chabot (1937) Anonymi Auctoris Chronicon Ad Annum Christi 1234 Pertinens -
Latin translation - open access at archive.org - bookmarked to the page which describes the
749 CE Sabbatical Year Quakes
Chronicon anonymum ad annum 1234 (ed. J. B. Chabot, CSCO, Scr. Syri,
36, 155-67).
Brock, S. P. and S. E. E. R. Institute (1997). A Brief Outline of Syriac Literature
, St. Ephrem Ecumenical Research Institute.
Brock, S.P. Syriac Historical Writing: A survey of the main cources
Debié, Muriel; Taylor, David G. K. (2012). "Chapter 8 Syriac and Syro-Arabic Historical Writing, c. 500-c. 1400"
in The Oxford History of Historical Writing. Vol. 2. Oxford: Oxford University Press. pp. 155–179. - some pages accessible at Google Books
Hoyland (2011) Theophilus of Edessa's Chronicle and the Circulation of
Historical Knowledge in Late Antiquity and Early Islam. United Kingdom: Liverpool University Press. -
contains translations of Chron. 1234 - open access at archive.org
Tritton, A. S., & Gibb, H. A. R. (1933a). The First and Second Crusades from an Anonymous Syriac Chronicle
. Journal of the Royal Asiatic Society of Great Britain and Ireland, 1, 69–101. - at JSTOR
Tritton, A. S., & Gibb, H. A. R. (1933b). The First and Second Crusades from an Anonymous Syriac Chronicle (Concluded from p. 101)
. Journal of the Royal Asiatic Society of Great Britain and Ireland, 2, 273–305. - at JSTOR
Wright, W. (1894). A Short History of Syriac Literature
, Black. - open access at Google Books