The idea was to get a dataset and use it as the basis for a workshop. A single 3-component profile would fit quite easily into anyone's workstation, and yet would contain enough information to end up with an estimate of the elastic moduli (to an unknown density factor) of the earth between the two boreholes.
A benefit of working with crosshole data is that it was expected that we would come across unexpected problems, and that many of our techniques would need to be developed from first principles, rather than available processing package solutions.