It is a Latin psalter on vellum, measures 380 x 310 mm and was probably produced at Christ Church, Canterbury.
It contains more than 100 11th-century coloured pen and wash drawings in the Utrecht Style, ending abruptly at Psalm 143:12, probably due to loss of pages rather than interruption of the original work.
[2] The second phase of production is represented by the fourth section (ff.58-73), where the same scribe from the first phase continued to write out the psalms, but rather than imitating the layout of the Utrecht Psalter, he simply left gaps for illustrations at the beginning of each psalm.
Only two 11th-century drawings are found in this part of the manuscript; it has been suggested that this was written to replace a portion of the Psalter which had been lost or damaged, as it fills a gap between two sections of seemingly earlier work.
[2] Janet Backhouse described the Harley Psalter as "one of the most important of all pre-Conquest English illuminated manuscripts".