on one's lonesome

Prepositional phrase

 * 1)  Alone; without aid or accompaniment.
 * 2) * 1996, Joan Jonker, Sweet Rosie O'Grady, ISBN 9780755391981 (2012 Headline ebook edition), Google books online:
 * "Sittin' there all on her lonesome the whole day long, it's understandable she gets down in the dumps."