Original: 37 -- 39 A year later , he published his first book of poetry ( Aceldama ) , and left Cambridge , only to meet Julian L. Baker ( Frater D.A. ) who introduced him to Samuel Liddell MacGregor Mathers and the Hermetic Order of the Golden Dawn .
Simplified: A year later , he published his first book of poetry ( Aceldama ) , and left Cambridge , only to meet Julian L. Baker who introduced him to Samuel Mathers and the Hermetic Order of the Golden Dawn .