His father died in 1885, but his mother decided that Louis must finished his studies before becoming the new director of the Yvert company.
While he disliked the political, legimist and conservative way of thinking of the paper and its readers, L'Écho de la Somme remained the main beneficial source of the Yvert et Tellier printing company.
1895, he ceased to write in L'Écho de la Somme and directed all his efforts to philatelic matters.
The first edition of the Catalogue prix-courant de timbres-poste par Yvert et Tellier was published in November 1896 for a price of two francs.
1 April 1913, Tellier retired and sold his parts to Louis Yvert, but, the latter friendly maintained the name of the chief-printer in the catalog title.
He put his two sons and his son-in-law at key posts of the company : Louis Yvert died in Amiens in 1950.