I think he lapped in 22.44, about 99.5.
True he crashed on melting tar, 1970 was a very hot year, and I'm sad to say that six were killed in the TT that year.
I can think of four: Michael Collins, Santiago Herrero, Brian Steenson, and dear old E.A. Lavington on his girder forked Velocette.
Arthur Lavington had ridden the TT since 1949, always on his Velocette. I think he crashed in practice at Kate's Cottage.