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    <abstract>On 22 August 1975, Dr. Charles Muses gave a talk at IIASA on hypernumbers, in which he has worked extensively. The talk was fascinating to me and he expressed many viewpoints with which I very much agree and which are not often voiced. He left reprints of two papers which I was eager to read. In general, his discussion and some of the claims he put forth stimulated me to re-examine a subject to which I had not given serious thought for perhaps fifteen years or more. 

On reading the papers, however, I found myself confused by the notation, especially by apparent inconsistencies. Also, the proliferation of &quot;species and subspecies&quot; of numbers without any apparent motive, and the incomplete development of the theory were troublesome. Furthermore, the use of exponential forms and the introduction of &quot;bimatrix arithmetic&quot; before the set or sets of numbers and their arithmetic (on which Muses lays great stress, properly I think) are rigorously defined, gives an impression of sleight-of-hand. Finally, the statement that &quot;specific details of method cannot be discussed explicitly at this time because of negotiations in progress&quot; is a virtual invitation to examine the subject critically. This paper does so from one viewpoint, namely the use of matrix arithmetic as a convenient mechanism for calculation with quantities which are noncommutative and, in some ways, non-unique. 

Rather than attempt to &quot;straighten out&quot; Muses&apos; notation, I will simply start from the beginning with notation of my own, standard in so far as applicable. Accidental similarities with other parts of Muses&apos; notation should not be assumed to imply equivalence.</abstract>
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