William goes to saddle up stables in the middle of the night when no one is around and takes five saddles. william's crime is

William's crime is larceny.
There are different types of thefts, including robberies, larcenies, and burglaries. Robbery is when you steal someone's belongings using threats, without their consent, but with their knowledge. On the other hand, larceny occurs when you steal someone's belongings without them knowing, which is the case here with William and him stealing 5 saddles furtively. 

JAMESTOWN is justifiably called "the first permanent English settlement" in the New World—a hard-won designation. As historian Alan Taylor recounts, of the first 104 colonists who landed in April 1607, only thirty-eight survived the winter. Of the 10,000 who left England for Jamestown in its first fifteen years, only twenty percent were still alive, and still in Jamestown, in 1622. The first months of the colony were chronicled by John Smith, Edward Wingfield, and in this selection by George Percy, who twice served as the colony's governor. After writing several accounts to justify his actions as governor, Percy left Jamestown for good in 1612. (John Smith, who also felt compelled to defend his leadership, had left for good in 1609.)

JAMESTOWN, 1609-1610. Known as the "starving time," the winter of 1609-1610 brought such "a world of miseries" to the settlers that hunger became the force governing the colonists. They ate their horses, then rats, then shoe leather. Some were driven to murder and digging up corpses. Others stashed food as they planned a secret return to England. Food was begged from the Indians or, if not forthcoming, stolen. The resulting cycle of attacks and counterattacks brought more misery and death. Who was to blame? John Smith? As the colony's previous governor he had compelled the men to work and was soon deposed and sent back to England, later justifying his dictatorial policies in repetitive histories and accounts. Or George Percy? Governor of the colony during the "starving time," he wrote this "true relation" partly as his defense against accusations of failed leadership. That Jamestown wasn't abandoned for good in June 1610 is due to the chance meeting on the James River of the ship carrying the sixty surviving colonists back to England, and the ship bringing provisions and 300 new colonists from England. But it was still many years before Jamestown was anything but "a world of miseries."

JAMESTOWN. Hampered by small royal coffers and by war with Spain and Ireland, England did not pursue an Atlantic coast colony for two decades after the loss of the 1587 Roanoke colony. Then in 1607 a new group of investors (the Virginia Company of London) received a charter from the new king (James I) to make a new attempt at a Virginia colony (Jamestown). This time the venture succeeded, but only after years of financial and human loss. This undated set of instructions was written by a Company member, perhaps Richard Hakluyt (hak-loot), to direct the leaders in their initial arrival, placement, and building of the colony. It also provides strict guidelines for dealing with the Powhatan Indians, who had massacred the Spanish settlers in a nearby settlement, Ajacan, thirty-five years earlier.

This is a essay I wrote for a question similar to your question. Sorry for so much words.