Due to his knowledge and the considerable size of the bookshop, Lynge had connections to almost all libraries and collectors at the time, and he supplied numerous Danish and foreign libraries with books. From the very beginning he took part in book auctions, and it is now widely accepted that it was probably him and his staff, who made the auctioneer’s sales record of the library of Søren Kierkegaard, when he died in November 1855. Doubt has been raised as to this conclusion, due to the catalogue not being especially well made, and knowing the thoroughness and knowledge of Lynge it sounds improbable that he should have made a catalogue, which is far from perfect. However, the catalogue could be bought at “Herman H.J. Lynge”, and it is difficult to see, who else would have been able to finish such a catalogue in the very short amount of time that passed between the death of Kierkegaard and the auction.