it went on, until his forties were running out, and his fiftieth birthday was drawing near: fifty was a number that he felt was somehow significant (or ominous); it was at any rate at that age that adventure had suddenly befallen Bilbo. Frodo began to feel restless, and the old paths seemed too well-trodden. He looked at maps, and wondered what lay beyond their edges: maps made in the Shire showed mostly white spaces beyond its borders. He took to wandering further afield and more often by himself; and Merry and his other friends watched him anxiously.