He advanced in Hierta"s employ and was eventually given editorial work. In 1846, he took over a printshop which he had previously rented for two years, and which now became known as Wallska tryckeriet, the Wall printshop. The company succeeded under his leadership and in 1847, he started Söndagstidningen (The Sunday News) and the next year Veckoskrift för barn och ungdom (Weekly Magazine for Children and Youth).
As a consequence, he was recognized as a burgess of the city in 1858.
Some failed dealings in spirits caused a bankruptcy in 1859 and forced him to embark on a journalistic career to support himself. He began at Göteborgs Handelsoch Sjöfartstidning, and later returned to Aftonbladet.
He also started the book series Sveriges handelskalender and translated political writings. When Wall established Dagens Nyheter in 1864, there was no other morning paper in Sweden.
He remained editor-in-chief until 1889.
The company was reorganized to become a public limited corporation in 1874, Dagens Nyheter Bachelor of Arts. Wall became its first chairman and remained so until his death.