II. Note on Rev. Robert Harley's paper, 'Professor Malet's classes of invariants identified with Sir James Cockle's criticoids

In 1882, a paper of mine “On a Class of Invariants ” appeared in the “Philosophical Transactions,” in which I used, for the determination of theorems, two classes of functions of the coefficients of linear differential equations. In consequence of a communication from the Rev. Robert Harley, I appended to the paper the following note:— “Since the publication of the abstract of this paper, the Rev. R. Harley has mentioned to me that the first class of functions treated of here have [has] been already investigated by Sir James Cockle; having consulted the memoirs I was referred to by Mr. Harley, I think little similarity will be found between Sir James Cockle’s results and mine.—J. C. M.”