From the back of the item:
The Gamesmaster's Veil is a wide screen, 8 1/2" tall by 30" wide. The front depicts the pentagram of the Nephilim Ka-elements, while the reverse displays numerous charts, tables, rules, definitions and corresondences helpful to the player and gamemaster alike.
The Astrological Modifier Calculator, printed on two sheets of heavy paper, quickly calculates the astrological modifer for any day of the month.
This booklet contains many items of interest. On the first page begins the special introductory adventure "Temple of the Ancients" in which the Nephilim find themselves awakened in the British Museum.