In dagen van strijd

*Letter (about Wallis) to H.J.A.M.Schaepman		1877	comments on work
*Letter (about Wallis) to J.C. Jolles-Singels		1877	comments on work
Nieuwe Boeken New Books		1878	comments on work
*Brief aan Francisca Gallé 24 dec. 1878 Letter to Francisca Gallé 24 dec. 1878		1878	comments on work
*Art. over Wallis in De Gids		1878	comments on work
*Art. on Wallis, In dagen van Strijd		1878	comments on work
Catalogus van der Hoek		1878	lists work
*Letter mentioning Opzoomer		1879	comments on work
In troubled times		1883	is translation of
Catalogue of Leesmuseum voor vrouwen		1886	lists work
De Spectator, *Mention in List of most popular books		1892	mentions work
Possessions of Damesleesmuseum Den Haag		1896	lists work
Geschiedenis der Noord-Nederlandsche Letteren in de XIXe Eeuw		1902	comments on work
*Presence in Nutsbibliotheken in Nederland		1910	lists work
*Mention in Het aandeel der vrouw [...]		1920	mentions work