bilbo was to take the part of a  burglar '' in the adventure.
what part was bilbo to take in the adventure?
a `` burglar ''
in the shire, 50-year-old bilbo is tricked by the wizard gandalf the grey into hosting a party for thorin and his company of dwarves: balin, dwalin, fíli, kíli, dori, nori, ori, óin, glóin, bifur, bofur, and bombur. gandalf's aim is to recruit bilbo as the company's "burglar" to aid them in their quest to enter the lonely mountain. bilbo is unwilling to accept at first, but has a change of heart after the company leaves without him the next day. bilbo races to join the company. travelling onward, the company is captured by three trolls. bilbo stalls the trolls from eating them until dawn, and gandalf exposes the trolls to sunlight, turning them to stone. the company locates the trolls' cave and finds treasure and elven blades. thorin and gandalf each take an elf-made blade, orcrist and glamdring, respectively; gandalf also finds an elven dagger, which he gives to bilbo.
the hobbit: an unexpected journey
bilbo baggins stumbled upon gollum's lair, having found the ring in the network of goblin tunnels leading down to the lake. at his wits' end in the dark, bilbo agreed to a riddle game with gollum on the chance of being shown the way out of the mountains. in the first edition of "the hobbit", gollum's size is not stated. only in the revised version is it specified that he is small and is actually an unnaturally long-lived hobbit. originally, he was also characterized as being less bound to the ring than in later versions; he offered to give the ring to bilbo if he lost the riddle game, and he showed bilbo the way out of the mountains after losing. to fit the concept of the ruling ring that emerged during the writing of "the lord of the rings", tolkien revised later editions of "the hobbit": the version of the story given in the first edition became the lie that bilbo made up to justify his possession of the ring to the dwarves and gandalf. in the new version, gollum pretended that he would show bilbo the way out if he lost the riddle-game, but he actually planned to use the ring to kill and eat the hobbit. discovering the ring missing, he suddenly realized the answer to bilbo's last riddle – "what have i got in my pocket?" – and flew into a rage. bilbo inadvertently discovered the ring's power of invisibility as he fled, allowing him to follow gollum undetected to a back entrance of the caves. gollum was convinced that bilbo knew the way out all along, and hoped to intercept him near the entrance, lest the goblins apprehend bilbo and find the ring. bilbo at first thought to kill gollum in order to escape, but was overcome with pity, and so merely leaped over him. as bilbo escaped, gollum cried out, "thief, thief, thief! baggins! we hates it, we hates it, we hates it forever!"
gollum