Liber Quattuor Experimentorum
Or the Four Experiments of the Spirits 
Birto, Agares, Bealpharos and Vassago
Frederick Hockley
Transcribed and Reformatted by A.D. Mercer
Liber Quattuor Experimentorum is a practical grimoire written to enable the adept to summon and communicate with the four spirits Birto, Agares, Bealpharos and Vassago.
​ ​
Liber Quattuor Experimentorum (The Four Experiments) is based on the manuscript held in the Wellcome Collection - MS 2842 (with additional material drawn from  MS 3203)

For the first time, this manuscript has been published in its entirety.
The book contains a full-colour reproduction of Frederick Hockley's original handwritten manuscript, A verbatim transcription of the original text and a complete transcription in modern English with all missing text and imagery included in order to make this a fully workable grimoire, making this the most complete edition of the manuscript published to date.
Also included are studies of the four spirits, examining their origins and development, together with a history of the Four Experiments and the different versions found in related manuscripts.
The volume also includes the version of the Four Experiments contained in Wellcome MS 3203, Henry Dawson Lea's Five Treatises upon Magic, reproduced in full alongside a new transcription, with the illustrations redrawn for clarity.
The final section reproduces The Experiment of Bealphares from Reginald Scot's The Discoverie of Witchcraft, which appears to preserve the source material from which the Bealpharos experiment later developed.
 
limited to 140 copies. 156 pages. Bound in Wintan Leather.
A5 format - case binding with gold foil blocking to cover & spine, deep red endpapers,
with red and black head and tail bands. Printed on 120gsm Munken Pure cream paper, stitched.
​