[1] In 1845, L.P. Grant became the chief engineer and superintendent of the Montgomery and West Point Railroad and remained with that road until 1848, when its track was laid as far as Opelika, Alabama.

[1] In 1859 and 1860, he was engaged as engineer of surveys and location of proposed roads in Alabama and Georgia but those were suspended on the approach of the [Civil] war.

[1] In 1862, [C.S.A] Colonel Grant was appointed a captain of engineers for the Confederacy and retained that position to the end of the [Civil] War.

[1] Colonel Grant was an early advocate of the Public School System and a member of the first Board of Education elected in 1869.

John Armstrong Grant, a railroad manager of Texas and early founding member of Grady Hospital, was the son of the first marriage.

The cited reference [1] of Walter Cooper's Official History of Fulton County was written by an appointment by the Georgia Grant Jury "in Pursuance to Legislative Action" and published in 1934.

In 1883, he donated 108 acres (44 ha) east and southeast of his mansion to the city for a park on condition that would be open and available free of charge to residents of any race, creed or color.

Lake Abana, where the zoo food court now exists below the panda exhibit, would have been witness to a crowd of bathers of any race, racial segregation not descending upon Atlanta until a decade or two later.

During this idyllic period of relative stability of racial tension, Grant opened a trolley line between downtown and the park.

On January 27, 1857, Grant founded the Atlanta Bank with John Mims, William Ezzard, Clark Howell, Sr., Jonathan Norcross, Richard Peters, Joseph Winship and N.L.

They were warned of Chicagoan George Smith who was planning on flooding Midwest banks with Georgia currency so avoided that scandal but eventually went broke and their charter was revoked in 1856.

Back in Atlanta in 1860, he and Richard Peters pushed a Georgia Western Railroad against Jonathan Norcross's Air Line.

After the Vicksburg Campaign, Confederate Chief of the Engineer Bureau Jeremy Gilmer contacted him to survey possible enemy crossings of the Chattahoochee River, and defensive works were begun in August, 1863.

It was bounded on the north on high ground (present location of the Fox Theatre), on the west by Ashby Street, on the south by McDonough Drive and on the east by Grant Park.

Because of how the Battle of Atlanta unfolded, these fortifications were never really put to the test, the city's Mayor Calhoun capitulating to the siege after the railways to Macon were seized by Union forces and Confederate General John Bell Hood was forced to destroy his ammunition train after the Union victory at Jonesborough.

In 1882 he donated roughly 100 acres (0.40 km2) in Land Lot 43 for Grant Park, current home of the Cyclorama and ZooAtlanta, later named in his honor, and the deed was issued May 17, 1883.

In 1884, he chartered Westview Cemetery with former mayor James W. English where he was buried after his death in 1893, a highly respected founding father of Atlanta.

The mansion was owned by Lemuel P. Grant, Atlanta's quintessential railroad man as well as a major landowner and civic leaderafter.

[6] Bobby Jones, the legendary golfer, was born in this home while the Jones family was in town visiting from Canton, GA. L.P. Grant's great-grandson, Bryan M. "Bitsy" Grant, the famed tennis player named to the International Tennis Hall of Fame, grew up in this home until the family moved to Ansley Park along 17th Street.