The manuscript is a review of a publication by Alexander Slidell Mackenzie. It includes several pages from Mackenzie`s work, each bearing annotations in Irving`s hand.

Correspondence between the folios of the manuscript and the pages of the printed article :

folios 1-12 = pages [319]-323;

folios 13-27 = pages 329-333;

folio 28 - not included in the published article;

folio 29 = page 334;

folios 30-31 = page 339;

folios 32-35 = 341-342.