What was Saint Francis of Assisi's miracle?

St. Francis of Assisi was known as a miracle worker even while he was alive. Below are two links, the first one contains the Bull of Canonization, and the second one lists some of the many miracles of this great saint. Here is an excerpt from "Miracles atributed to St. Francis of Assisi":

So many miracles were attributed to St. Francis of Assisi both before and after his death, that volumes have been compiled to contain them. During the life of St. Francis of Assisi and even beyond, crippled were healed, blind received their sight, those possessed were exorcised by his mere walking into the room, terminally ill people recovered, swellings went away, dropsies were cured, Arthritis disappeared, paralyzed people began to walk again, lepers were cleansed, mutes began to speak and the deaf began to hear. Many miracles were attributed to this great saint.