Handel and Telemann kept up a robust correspondence and, not surprisingly, Telemann’s friendship and correspondence resulted in numerous Conversations between the two composers. And perhaps uniquely, this was a true two-way Conversation, with each man influencing the other. Here is an example of how Telemann influenced Handel. Handel, a subscriber to Telemann’s Tafelmusik publication, took the basic theme from the opening to the Violin Concerto in F major (1740) and expanded upon it for his famous Arrival of the Queen of Sheba (1749), one of the most famous works of the entire Baroque Period. I stumbled on this Conversation as a kid, playing the Telemann and knowing that I had heard that theme somewhere before. With no Google or streaming music services, my curiosity had to wait several months before figuring it out at a concert.
Georg Philipp Telemann, Tafelmusik, Violin Concerto in F Major:
George Frideric Handel, Arrival of the Queen of Sheba:
A Gertus History of Music 