There is much in-depth information in this article: The Synoptic Gospels in the Ancient Church: The Testimony to the Priority of the Gospel of Matthew. We have a brief introduction to papyrus from Tyndale Bible Dictionary. We have a lengthy apologetic article on Papias and the arguments from higher critics by F. David Farnell. This is followed by Papias' writings from two leading scholars on the Apostolic Fathers, Michael W. Holmes, and J. B. Lightfoot.
SAMUEL PRIDEAUX TREGELLES [1813-1875]: How Did He Contribute to New Testament Textual Studies?
Tregelles was an English Bible scholar, textual critic, and theologian. He was born to Quaker parents at Wodehouse Place, Falmouth on January 30, 1813.
KARL LACHMANN [1793-1851]: How Was He a Foundational Contributor to New Testament Textual Studies?
Karl Konrad Friedrich Wilhelm Lachmann (German: [ˈlaxman]; 1793 –1851) was a German philologist and textual scholar. He is particularly noted for his foundational contributions to the field of New Testament Textual Studies.