Now the importance of this excursus on the Young Hegelians lies in the fact that Karl Marx was a humanist, and looked on humanism as the vital and creative principle in the renovation of political and industrial society.
"Contemporary Socialism"
John Rae
Many subjects which might properly form the subject of excursus in a larger history have been perforce omitted, the object being to give, not a series of interesting essays on detached points, but a conspectus of the actual literary progress and accomplishment of the century, from 1557 to 1660. Such essays exist already in great numbers, though some no doubt are yet to write.
"A History of English Literature Elizabethan Literature"
George Saintsbury
Boisgelin, who was a Knight himself and wrote his history after his expulsion from Malta, is valuable for his elaborate excursus on the financial system of the Order.
"Knights of Malta, 1523-1798"
R. Cohen