Editor's Note: CNN's Moni Basu, a Bengali immigrant, was born in Kolkata, India.

In the next few weeks, Fatima Shaik, an African-American, Christian woman, will travel "home" from New York to Kolkata, India.

It will be a journey steeped in a history that has remained unknown until the publication last month of a revelatory book by Vivek Bald. And it will be a journey of contemplation as Shaik, 60, meets for the first time ancestors with whom she has little in common.

"I want to go back because I want to find some sort of closure for my family, said Shaik, an author and scholar of the Afro-Creole experience.

Fatima Shaik's grandfather settled in New Orleans. She is going to India to see his home.

That Americans like Shaik, who identify as black, are linked by blood to a people on the Indian subcontinent seems, at first, improbable.

South Asian immigration boomed in this country after the passage of landmark immigration legislation in 1965. But long before that, there were smaller waves of new Americans who hailed from India under the British Empire.

The first group, to which Shaik's grandfather, Shaik Mohamed Musa, belonged, consisted of peddlers who came to these shores in the 1890s, according to Bald. They sold embroidered silks and cottons and other "exotic" wares from the East on the boardwalks of Asbury Park and Atlantic City, New Jersey. They eventually made their way south to cities like New Orleans and Atlanta and even farther to Central America.

The second wave came in the 1920s and '30s. They were seamen, some merchant marines.

Most were Muslim men from what was then the Indian province of Bengal and in many ways, they were the opposite of the stereotype of today's well-heeled, highly educated South Asians.