John Hay and John Nicolay, both from Pittsfield became personal secretaries to Lincoln when he became President of the United States. Many Civil War era homes still exist in Pike County. In fact, there are more houses and sites associated with Lincoln in Pittsfield, Illinois than in any other place in the country.
Cottonee does not need to reach any particular level to evolve. You can use a Sun Stone on it and it will evolve into Whimsicott! Happy playing :)
Two of Eevee's evolved forms, Leafeon and Glaceon, require you to level up the Eevee near a moss rock or an ice rock respectively to achieve the evolution. If you level up your Eevee near either of these, it will evolve into one of the other forms no matter whether or not you met the conditions for Sylveon above.