Book  (1936)  Page(s) 457.  
 
Marinus (polyantha) ? ? (Beckwith); sport of Kersbergen; dark scarlet, lasting, medium size, double, flat, in clusters of 60, floriferous, continuous bloom, growth 5/10, upright, bushy, short. Sangerhausen

Website/Catalog  (1932)  Page(s) 50.  
 
New Roses 1931.  Marinus  (Dwf. Poly.) 2. After the style of 'Ideal', but even better. The dark red colour extends almost to the base of the petals. 'Orleans' type of growth. Recommended. 2/- each.

Magazine  (8 May 1931)  Page(s) 266.  
 
Frühjahrsausstellung Rotterdam /B. Grosse-Boskoop....
Vom 17. bis 26. April fand in Rotterdam die mit großer Reklame angekündigte Frühjahrsblumenausstellung statt........Neuere Polyantha-Rosen zeigte G. H. Kersbergen, Hazerswonde, u. a. Perfection zartrosa, Marinus, und Paul Grampel, die allerdings in der Farbe der Gloria Mundi ähnelt.

Translation:
Spring Exhibition Rotterdam / Great Boskoop
From 17 to 26 April, the heavily advertised spring flower exhibition took place in Rotterdam........Newer polyantha roses were shown by G. H. Kersbergen, Hazerswonde, including Perfection soft pink, Marinus, and Paul Grampel, which, however, is similar in colour to Gloria Mundi.