author
Known by the pen name H. Bertrand, this Dutch writer brought history and adventure together in a lively tale set during the Dutch Revolt. Her best-known work follows intrigue, danger, and shifting loyalties in the Netherlands of 1572.

by H. Bertrand, Archibald Clavering Gunter
Writing under the pseudonym H. Bertrand, Louise Zaalberg was a Dutch author active in the late nineteenth and early twentieth centuries. Available library and audiobook sources connect the name H. Bertrand with Zaalberg and identify her as the writer behind Een strijd om de schatten van Alva of De watergeuzen in 1572.
That novel is a historical adventure set during the struggles of the Netherlands against Spanish rule. It follows an English adventurer caught up with the Watergeuzen, blending action, political conflict, and romance in a way that would have appealed to popular readers of the time.
Confirmed biographical details about her life are limited in the sources I found, but her surviving reputation rests on this vivid historical fiction and on the use of the H. Bertrand pen name under which the work has continued to circulate in digital libraries and audiobook collections.