Both Uses

overture
in
Uncle Tom's Cabin
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Tom watched the little lady a great deal, before he ventured on any overtures towards acquaintanceship.†
Chpt 1.14 *
His pockets were full of miscellaneous articles of attraction, which he had hoarded in days of old for his master's children, and which he now produced, with commendable prudence and economy, one by one, as overtures for acquaintance and friendship.†
Chpt 1.14

Definitions:

(1) (overture as in: played the William Tell Overture)
orchestral music played as an introduction to a longer piece -- especially an opera or oratorio
(2) (overture as in: she made an overture)
a tentative suggestion designed to draw out the reactions of others with the hope of developing something more substantial
(3) (overture as in: the play's overture)
any beginning or introduction -- such as a written introduction for a play, poem, or other literary work
(4) (meaning too rare to warrant focus)