In «Sets of Operations in Relation to Groups of Finite Order,» he chose explicitly to «abandon the idea of a group of... operations... on some unspecified object, as being an idea which... appertains to
a special interpretation of the symbols» (PRSL64: 319 - 20).
Verses 16 - 21 retell the miracle of walking on the water (see Mark 6:45 - 52), and it is interesting to note that John offers
no special interpretation of it.