Henry May was a U.S. Representative

United States House of Representatives

The United States House of Representatives is one of the two Houses of the United States Congress, the bicameral legislature which also includes the Senate.The composition and powers of the House are established in Article One of the Constitution...

 from Maryland

Maryland

Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...

.

Born in Washington, D.C.

Washington, D.C.

Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

, May pursued an academic course. He attended Columbian College (later George Washington University

George Washington University

The George Washington University is a private, coeducational comprehensive university located in Washington, D.C. in the United States...

), Washington, D.C.

Washington, D.C.

Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

. He studied law, was admitted to the bar

Admission to the bar in the United States

In the United States, admission to the bar is the granting of permission by a particular court system to a lawyer to practice law in that system. Each U.S. state and similar jurisdiction has its own court system and sets its own rules for bar admission , which can lead to different admission...

 in 1840, and commenced practice. May was sent by President Franklin Pierce

Franklin Pierce

Franklin Pierce was the 14th President of the United States and is the only President from New Hampshire. Pierce was a Democrat and a "doughface" who served in the U.S. House of Representatives and the Senate. Pierce took part in the Mexican-American War and became a brigadier general in the Army...

 to Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 to investigate claims under the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

' treaty of peace with Mexico. He moved to Baltimore, Maryland, in 1850.

May was elected as a Democrat

Democratic Party (United States)

The Democratic Party is one of two major contemporary political parties in the United States, along with the Republican Party. The party's socially liberal and progressive platform is largely considered center-left in the U.S. political spectrum. The party has the lengthiest record of continuous...

 to the Thirty-third

33rd United States Congress

The Thirty-third United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1853 to March 3, 1855, during the first two years...

 Congress (March 4, 1853-March 3, 1855). He was an unsuccessful candidate for reelection in 1854 to the Thirty-fourth

34th United States Congress

The Thirty-fourth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1855 to March 4, 1857, during the last two years...

 Congress, but was elected as a Unionist to the Thirty-seventh

37th United States Congress

The Thirty-seventh United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1861 to March 4, 1863, during the first two...

 Congress (March 4, 1861-March 3, 1863). He died in Baltimore, Maryland, and is interred in Cathedral Cemetery.