Go and click to the invitation bar and you can find an option written as " search friends " . Then it's easy to find that unknown user if you're pretty fond with his/her username and DP ( display picture ).
Ulysses S.Grant
He was the final commander of the union Army
On 18 June, the United States declared war on Great Britain, citing, in part, impressment. After the Napoleonic Wars impressment was ended in practice, though not officially abandoned as a policy. The last law was passed in 1835, in which the power to impress was reaffirmed.