Interlinear Septuagint

Studylight.org has an interlinear Septuagint. The Septuagint, for those that may not know, is the Greek Old Testament. The Septuagint is actually older than the Hebrew Old Testament. I think I got that fact from Margaret Barker, correct me if I'm wrong. I'll have to check the reference. I'm sure there is some debate about the dates they were both written.