A mere mental operation, or an attempted acceptance, not communicated to the offeror, does not constitute a legal acceptance.
To recall an offer, the offeror must communicate his intention so to do, to the acceptor before acceptance.
The offeror may stipulate in his offer by letter, that the contract shall not be made until he is in receipt of a reply.
Old English ofrian "to offer, show, exhibit, sacrifice, bring an oblation," from Latin offerre "to present, bestow, bring before" (in Late Latin "to present in worship"), from ob "to" (see ob-) + ferre "to bring, to carry" (see infer). The Latin word was borrowed elsewhere in Germanic, e.g. Old Frisian offria, Middle Dutch offeren, Old Norse offra. Non-religious sense reinforced by Old French offrir "to offer," from Latin offerre. Related: Offered; offering.