Warren and I shared an increasingly close working relationship over 11 years from the time of his appointment as Director-General of the National Library of Australia in 1985 until the completion of my term as National Librarian of New Zealand in late 1996. We believed at the time that we had created a form of collaboration that was unique among national libraries. Our collaboration extended beyond the organisational bounds of our libraries into international library activities. It also formed the foundation for the increasing contribution Warren came to play within the wider New Zealand library community. Our collaboration was founded on a history of cooperation that had been built between the two national libraries and between other libraries across the Tasman. One pertinent example of this tradition was Harrison Bryan's direct support to the National Library of New Zealand which was critical to the successful implementation of the New Zealand Bibliographic Network. This was the foundation for later technology cooperation.