[3] One year earlier, Middelboe had already debuted at the Charlottenborg Spring Exhibition with a historical genre picture, Mogens Munk says goodbye to Christian II after leaving the letter of resignation in his glove.

[3] Early in the summer of 1890, Middelboe made what must have been the most difficult decision of his life to say goodbye to his art and travel to Paris to familiarize himself with modern photomechanical reproduction methods at the company Photogravure Vitou.

[8] He was among the pioneers of his profession; he himself had to test the various modern methods as they emerged, and since his training as an artist made him place high demands on the exact reproduction, it is not without reason that his company became one of the most respected within the subject.

[3] Bernhard Middelboe's work has been offered at auction multiple times, with realized prices ranging from 959 USD to US$2,257, depending on the size and medium of the artwork.

[9] Since 2019 the record price for this artist at auction is 2,257 dollars for De første sommergæster, sold at Bruun Rasmussen Bredgade in 2022.