Reading this stuff re. re., put me in mind of something I came across years ago, which is consecutive "hads", in a piece. It goes,

In an English language exam, Peter had had had. John had had had had. Had had had had the examiner's approval.

Terry L Marshall B.A.(Law), M.B.Ch.B., F.R.C.Path
Consultant Histopathologist
Rotherham General Hospital, Yorkshire
terry.marshall@rgh-tr.trent.nhs.uk