of the real outline of Australia relies upon a second set of assumptions. He argues taking that approach, "Jave La Grande" could be re-assembled to look like anything. Another dimension of the argument Richardson advances against the theory relates to methodology. Richardson argues that McIntyre's practice of re-drawing sections of maps in his book was misleading because, in an effort to clarify, he actually omitted crucial features and names that did not support the Portuguese discovery theory. Richardson's own view is that a study of placenames) on "Jave La Grande" identifies it as unmistakably connected to the coasts of southern Java and Indochina. Emeritus Professor Victor Prescott has claimed Richardson "brilliantly demolished the argument that Java la Grande show(s) the east coast of Australia." However, Australian historian Alan Frost has recently written that Richardson's argument that the east coast of Java la Grande was in fact the coast of Vietnam is "so speculative and convoluted as not to be credible". In 1984, criticism of The Secret Discovery of Australia also came from master mariner Captain A. Ariel, who argued McIntyre had made serious errors in his explanation and measurement of "erration" in longitude. Ariel concluded that McIntyre erred on "all navigational ... counts" and that The Secret Discovery of Australia was a "monumental piece of misinterpretation." French cartographic historian Sarah Toulouse concluded, in 1998, that it seemed most reasonable to see in la Grande Jave, in the present state of the available sources, the pure product of imagination of a Norman cartographer who formed a school with his compatriots. In 2005, historian Michael Pearson made the following comment on the Dieppe maps as evidence of a Portuguese discovery of Australia: If the Portuguese did in fact map the northern, western and eastern coasts, this information was hidden from general knowledge ... The Dieppe maps had no claimed sources, no "discoverer" of the land shown ... and the iconography on the various maps is based on Sumatran animals and ethnography, not the reality of Australia. In this sense the maps did not really expand European knowledge of Australia, the portrayal of "Jave La Grande" having no greater status that any other conjectural portrayal of Terra Australis. In a recent interpretation of the Dieppe maps, Professor Gayle K. Brunelle of California State University, Fullerton argued that the Dieppe school of cartographers should be seen as acting as propagandists for French geographic knowledge