Avon
2 of the 7 encyclopedias on this shelf carry an entry for Avon. Both are reproduced below, so you can see where they agree and where they differ.
Aiton's Encyclopedia (1910)
the name of several English rivers. The word is British, meaning water. The Upper Avon rises near Naseby, Northampton. It forms the border of Leicester. It passes through Warwickshire and Worcestershire to the Severn at Tewkesbury. Its valley is one of the most beautiful in England. Rugby, Warwick, and Stratford-on-Avon are situated on its banks. It is about 100 miles in length. This is the Avon of Shakespeare, the stream from which he is called the "Avon Bard." Lower Avon, or Bristol Avon, flows into the Severn after it has become so broad that it is known rather as Bristol Channel. Bath and Bristol are on its banks. It is about eighty miles in length. This is the Avon on which the ashes of Wyclif were cast. The East Avon flows into the English Channel . It is about sixty-five miles in length. Salisbury, with its ancient cathedral, is situated at the junction of the Wily and Bourne with the East Avon. 2026 Editor's Note: Shakespeare's Avon made Stratford-upon-Avon one of the most visited literary shrines on earth, home to the Royal Shakespeare Company. The name also flowed into commerce far from Warwickshire: the cosmetics giant Avon took it, and its 'Avon calling' door-to-door sellers once numbered in the millions. (Ed: BR 2026-06-09)
Collier's New Encyclopedia (1921)
the name of several English and Scottish rivers, the best known of which is that Avon which rises in Northamptonshire, and flows into the Severn at Tewkesbury, after a course of 100 miles. On its banks is Stratford-on- Avon, the birthplace and abode of Shakespeare, who has hence been styled the Bard of Avon.