David Chytraeus (1530-1600) was a Lutheran professor of theology at Rostock. His Chronologiawas a charted history of events since creation synchronising classical and biblical events. Of particular interest was the debate concerning the actual date of the birth of Christ.
Liddel may have lectured on this subject using this text at Helmstedt and certainly this copy of the Chronologia is one of the most heavily annotated. It is also interleaved with sheets on which Liddel has written on a number of subjects. The page shown here for example is titled Errores papa [Errors of the popes] and appears to reference the Council of Trent. Liddel seldom commented on theological matters and this volume is one deserving of further study.