Fourteen years later, he was able to publish the 2-volume work entitled Early Sources of Scottish History, A.D. 500 to 1286, a similar but larger collection of sources, this time taken from non-English (mostly Gaelic) material.
Catorce anos despois, publicou un traballo de dous volumes titulado Early Sources of Scottish History, A.D. 500 to 1286, unha recompilación de fontes meirande, desta volta a partir de material non inglés (a maioría gaélicas).