Frank J. Wilstach, comp. A Dictionary of Similes. 1916.
Vaguely
Vaguely, like certain luminous scenes of the theatre back of those thin curtains which suddenly descend on the scenic stage, transporting the spectators from the tumult of a ballroom to the silence of a private house.
—Edmondo de Amicis
Vaguely, as in a dream.
—Fitz-James O’Brien