Complex sentence: Gershon Legman was the first to link "Walter" and Ashbee in his introduction to the 1962 reprints of Ashbee's bibliographies; the 1966 Grove Press edition of "My Secret Life" included an expanded version of that essay.
Split into simpler sentences: Gershon Legman was the first to link "Walter" and Ashbee, in his introduction to the 1962 reprints of Ashbee's bibliographies. The 1966 Grove Press edition of "My Secret Life" included an expanded version of that essay.