jwfacts....Although misleading, that quote does not actually attribute the view to Lipsius himself. That was done in an Insight on the News item. I have the copy somewhere (I photocopied every article I could find on the cross).
*** w80 2/15 p. 30 Insight on the News ***
Whether the wooden sculpture is the work of the 16th-century artist Michelangelo or not, it illustrates that the impalement of Christ on a cross frame has not always been so certain as Christendom’s leaders today would have people believe. For example, the 16th-century Roman Catholic scholar Justus Lipsius illustrated impalement on an upright stake in his book “De Cruce Liber Primus.” This fits the meaning of the Greek word used in the Bible to describe the impalement of Christ.