sentence: Roger Collins, Early Medieval Europe; 300–1000, Second Edition (New York: St. Martin's Press, 1999), p. 187 He was able to put together a confederacy of a number of smaller kingdoms and from that he created Mercia.
modified: fix grammar: Roger Collins, Early Medieval Europe; 300–1000, Second Edition (New York: St. Martin's Press, 1999), p. 187 He was able to put together a confederacy of a numbest of smallest kingdoms and from that he created Mercia.