As a result of the Act, the great body of the Eng­lish com­mon law became, so far as applic­a­ble, in force in this state, and remains in force except so far as it has been mod­i­fied or repealed by statute, or changed or mod­i­fied by cus­tom as found in deci­sions of our courts. The com­mon law, when applic­a­ble, is as much a part of the law of the state, where it has not been expressly abro­gated by statute, as the statutes them­selves. In other words, Illi­nois is a com­mon law state.