In his Book "The Shakespeare Myth" (page 8-9) he claimed that the Droeshout engraving of Shakespeare contained visual codes pointing to a secret authorship. He wrote
He did not mention the strange asymmetries of the different hair length of the left and right head side (left) and"there is no question – there can be no possible question – that in fact it is a cunningly drawn cryptographic picture, shewing(....) a mask... [ a double person ]
He did not mention the strange asymmetries of the different hair length of the right and left head side as well as the non visible collar stiffening line of the upper right collar side compared to the visible collar stiffening line on the reverse side left , both also indicating alegorically a different front and back side of a different front and back man ....
Unfortunately due to Durning-Lawrence's lack of information (we dispose of today) his fine observations and clear insights (that the Stratfordman cannot have been the playwright of the Canon) could not yet lead him to a final solution of the Shakespeare authorship problem. There is great value in reexperiencing him afresh ...He was clearly ahead of his time.