From "Amtsblatt des Kantons Zürich", 1872, p. 456:] Louis Knapper, gardener, lived in Riesbach, currently absent unknown, is invited to pay to Mr. Albert Knapper, nurseryman, living in Karlsruhe, his demand of Fr. 4000 plus interests and costs within ten days from today, as otherwise the auction of the pledges will be approved. Zürich, 23. February 1872
[From
Wiener Illustrirte Garten-Zeitung, 1881, p. 330:] Mr. Albert Knapper, rose breeder in Maximilansau on the Rhine, states that Multiflora alba and De Ferrières are hardy 1879-1880.
[From
Dr. Neubert's deutsches Garten-Magazin, 1881, p. 63:] Catalogues published and to be received from following companies: Albert Knapper, Rose breeder in Maximilansau on the Rhine. Index of varieties and prices, besides classification and culture of roses, miscellaneous recipes, etc.
[From
Garden and Forest, October 16, 1895, p. 418-419:] The first annual meeting of this society [American Dahlia Society] was held on Wednesday last in Philadelphia, at the rooms of A. Blanc....Other exhibitors were A. Blanc, Philadelphia; Albert Knapper, Frankford, Philadelphia....
[From
American Gardening, May 21, 1898, p. 401:] American Grown Clematis. Advert. Albert Knapper clematis, Frankford, Phila. Pa.
[From
American Gardening, 1900:] Another rarity was a small plant of Edelweiss ( Leontopodium alpinum), shown by Mr. Albert Knapper, of Frankfort, Philadelphia.
[From
American Florist, May 21, 1904, p. 700:] F. M. Foulds has taken the greenhouses of Albert Knapper at Ambler, Pa. and will grow cut flowers for the Philadelphia market.
