It is not known exactly when Shakespeare began writing, but contemporary allusions and records of performances show that several of his plays were on the London stage by 1592. By then, he was sufficiently well known in London to be attacked in print by the playwright Robert Greene in his Groats-Worth of Wit:
...there is an upstart Crow, beautified with our feathers, that with his Tiger's heart wrapped in a Player's hide, supposes he is as well able to bombast out a blank verse as the best of you: and being an absolute Johannes factotum, is in his own conceit the only Shake-scene in a country.
Scholars differ on the exact meaning of these words, but most agree that Greene is accusing Shakespeare of reaching above his rank in trying to match university-educated writers such as Christopher Marlowe, Thomas Nashe and Greene himself (the "university wits"). The italicised phrase parodying the line "Oh, tiger's heart wrapped in a woman's hide" from Shakespeare's Henry VI, Part 3, along with the pun "Shake-scene", identifies Shakespeare as Greene's target. Here Johannes Factotum—"Jack of all trades"— means a second-rate tinkerer with the work of others, rather than the more common "universal genius".
Greene's attack is the earliest surviving mention of Shakespeare's career in the theatre. Biographers suggest that his career may have begun any time from the mid-1580s to just before Greene's remarks. From 1594, Shakespeare's plays were performed by only the Lord Chamberlain's Men, a company owned by a group of players, including Shakespeare, that soon became the leading playing company in London. After the death of Queen Elizabeth in 1603, the company was awarded a royal patent by the new king, James I, and changed its name to the King's Men.
In 1599, a partnership of company members built their own theatre on the south bank of the River Thames, which they called the Globe. In 1608, the partnership also took over...