### Erratum for * Finding D-optimal designs by randomised decomposition
and switching* (Australasian Journal of Combinatorics
55 (2013), 15-30).

In Section 4 (page 20) we stated that for order 26 there are *exactly
three* H-inequivalent maxdet matrices composed of circulant blocks. This
statement was based on Kounias *et al* [13, Table 1]. However, as
observed by Dragomir Djokovic [personal communication, July 2014], the
statement is incorrect as there are * at least four* such
H-inequivalent maxdet matrices composed of circulant blocks.
This does *not*
change the total number (9923) of known H-classes for order 26.