This is the cover page and two other pages from the secret military agreement between Israel and South Africa, signed by both Shimon Peres and Botha. Note on page two there is a clause that says the very existence of the agreement is secret. Both men have signed the agreement on page three.
This is the secret memo by South Africa's military chief of staff, General RF Armstrong, asking for nukes on the Jericho missiles. It has been revealed before, but its context was not understood. We now know the memo was the direct result of the meeting between Botha and Peres, and the basis of Botha's demand for nukes from Peres.