In his report to the king, cabeza de vaca

Okay well since this is an unfinished question, I will just tell you about the report and Cabeza de Vaca.  
 Alvar Nuñez Cabeça de Vaca was one of four survivors of the expedition to Florida commanded by Pánfilo Narvaez. He spent eight years with the native tribes of the Texas-Northern Mexico region learning their languages and customs. Six of the eight years were spent in the vicinity of Galveston Island as a trader between tribes. Cabeza de Vaca, as an outsider, could carry out mutually beneficial trade between tribes that were at war with each other. When he and the three others left the Galveston area they functioned as faith healers among the natives.

When Cabeza de Vaca and the others reached the Spanish Empire outpost of Culiacan thousands of miles away on the west coast of Mexico in what is now the state of Sinaloa.

After of period of recovery in Culiacan, Cabeza de Vaca and the others traveled on to the city Guadalajara and from there to Mexico City. Many Spanish Empire officials recognized that Cabeza de Vaca's experience would make him extremely valuable on any future expeditions into the interior of North America. He knew several native languages and understood the cultures. Cabeza de Vaca himself wanted to go back and bring the native tribes into the Spanish Empire and convert them to Christianity by humane and enlightened means. But Cabeza de Vaca that if he were to carryout the spread of Christianity and Spanish civilization by humane means it could only occur if he were the leader of the expedition.

He undertook a perilous journey back to Spain to seek his appointment by the King to the leadership of another expedition. Unfortunately for Cabeza de Vaca and for the natives the King had already appointment Hernando de Soto to lead the next expedition. De Soto asked Cabeza de Vaca to join his expedition but Cabeza de Vaca refused. De Soto was a soldier, an accomplished military leader, and was not likely to give much credence to Cabeza de Vaca's concern for humaneness and fairness.

The King offered Cabeza de Vaca the leadership of an expedition to explore the northeastern part of North America but Cabeza de Vaca turned it down. However the King did appoint Cabeza de Vaca to leadership of an expedition but not in North America. The Spanish colony in the region of the Rio de la Plata in South America was in trouble. The Governor of the colony was missing and feared dead. Cabeza de Vaca was to go to Rio de la Plata area and seek out the missing governor and if that governor was dead Cabeza de Vaca was to take his place as governor.

The allusion of ring around the rosy is, the Black death. (The virus looks like red circles) The Black Death originated in China and Central Asia and was transmitted to Europe in 1347 when a Eurasian army attacked a trading port in Crimea. The army catapulted plague-infested corpses into the town to spread the infection. From this trading port, ships carried the disease westward to Mediterranean ports, and from there the disease quickly spread inland.

The pandemic was called the Black Death because of the black spots that developed on the skin of many victims.

The Black Death was thought to be a combination of two plagues: bubonic and pneumonic. Bubonic plague does not spread directly from person to person but from rodent to person or person to person by infected fleas. Pneumonic plague is highly contagious and passes from person to person through droplets from coughs or sneezes.

Living conditions in medieval towns and overcrowding in housing encouraged the spread of disease. Poor sanitation in cities created breeding grounds for rats that carried the disease. Death rates from the Black Death varied from place to place. The disease spread more quickly in populated towns than in the countryside.

Monasteries were devastated by the disease, which passed quickly through the community since monks lived in close contact with one another. They also had many visitors passing through, allowing for more chances of it entering the community.

Those with money and power and the means to leave the areas affected were not immune from the plague. For instance, King Alfonso XI of Castile and Joan, the daughter of English king Edward III, died from the disease.

Death rates from the Black Death varied from place to place. The disease spread more quickly in populated towns than in the countryside.

Monasteries were devastated by the disease, which passed quickly through the community since monks lived in close contact with one another. They also had many visitors passing through, allowing for more chances of it entering the community.

Those with money and power and the means to leave the areas affected were not immune from the plague. For instance, King Alfonso XI of Castile and Joan, the daughter of English king Edward III, died from the disease.

While mortality rates from plague during the Black Death varied in different regions, the total death count is estimated to be 25 million people throughout Europe. The population of western Europe did not return to its pre-1348 level until the beginning of the 16th century.