Elmer,
Albert Pike wrote extensively defending his actions and handling of funds he obtained in Richmond. In particular see ORs Series 1, Vol. 13, Page 975 -- Pike to S. Cooper, Aug. 3, 1862. In Vol. 13, from page 936 to the end of the volume includes many letters of Pike's complaints and explanations to Hindman, Holmes, and to Richmond.

In Feb. 17, 1866, Albert Pike wrote to the US Commissioner of Indian Affiars about the loyalty of Chief John Ross and the Cherokee Nation to the Southern Confederacy. Pike states:

I had procured at Richmond, and paid Mr. Lewis Ross, Treasurer of the Cherokee Nation, about the first of March 1862, in the Chief's house and in the Chief's presence, the moneys agreed to be paid them by Treaty, being about $70,000 (I think) in coin, and among other sums $150,000 in Confederate Treasury notes, loaned the Nation by way of advance on the price expected to be paid for the Neutral land. This sum had been promised in the Treaty at the earnest solicitation of Mr. John Ross; and it was generally understood that it was desired for the special purpose of redeeming scrip of the Nation issued long before, and much of which was held by Mr. Ross and his relatives. That such was the case, I do not know. I only know that the moneys were paid, and that I have the receipts for them, which, with others, I shall file in the Indian Office. [Abel, Annie Heloise; The American Indian as slaveholder and secessionist; Footnote 228, pages 134-140, Pike to Cooley, Feb. 17, 1866 (specifically p. 138-139)]

There is a biography of Albert Pike, which I have not read, which may give more information (or sources) regarding the funds Pike obtained in Richmond and how they were paid to the Cherokee and other Nations.

Ken