 After his apprenticeship, Lynge continued to work in the company, and when Sæbye died in 1844, the young man, only aged twenty-two, took over as manager of the bookshop, which was still owned by the Sæbye family.In 1853 Lynge was able to buy the bookshop from the family at the price of 1,000 rix-dollars, and at the same time he took out a trade licence as a bookseller.In the first years the cholera was harrying Copenhagen, and Lynge is said to have done great business at the time due to the large number of private libraries offered for sale; he was the only proper “antiquarian bookseller” in Denmark, and he often spited the danger of infection and personally collected the large number of books in the homes of the ill.