The history of African graves in the Florida Keys is intertwined with the broader historical context of the region, including periods of colonization, slavery, and subsequent developments. While there may not be specific documentation for early African graves near Alligator Reef, it is known that the presence of African communities in Florida dates back to the colonial era.

Here are some key points related to African American history in the Florida Keys:

1. **Slavery in Florida:**
   - Florida has a history of slavery during the Spanish and later the British and American colonial periods. Enslaved Africans were brought to Florida to work on plantations and in various industries.

2. **Key West's African Cemetery:**
   - Key West, in particular, has historical significance regarding African American communities. The African Cemetery at Higgs Beach in Key West is one notable site. This cemetery was established in the early 19th century and is believed to be the final resting place for many African individuals, including those who were formerly enslaved.

3. **Bahamian Influence:**
   - The Florida Keys, including Key West, had a significant Bahamian influence. Many Bahamians, including those of African descent, migrated to the Keys in the 19th century, contributing to the cultural diversity of the region.

4. **Gullah/Geechee Culture:**
   - Gullah/Geechee communities, which have African cultural influences, can be found in some coastal areas of the southeastern United States. While the Florida Keys are not traditionally associated with Gullah/Geechee culture, the broader history of African American communities in the region is diverse.

5. **Historical Research:**
   - Historical research and archaeological studies may uncover additional information about African American history, including burial practices, in the Florida Keys. Archaeological excavations and studies of historical records contribute to a better understanding of the region's past.

6. **Cultural Heritage and Preservation:**
   - Efforts are ongoing to preserve and interpret African American cultural heritage in Florida, including the identification and protection of historic sites, cemeteries, and other important landmarks.

For specific details about early African graves in the Florida Keys, it is recommended to consult local historical societies, cultural organizations, and historians who specialize in the region's history. They may provide insights, resources, or updates on ongoing research related to African American heritage in the Florida Keys.