In 1848 W. N. Hutchinson published his book Dog Breaking: The Most Expeditious, Certain and Easy Method, Whether Great Excellence or Only Mediocrity Be Required, With Odds and Ends for Those Who Love the Dog and the Gun. Primarily concerned with training hunting dogs such as pointers and setters, the book advocates a form of reward-based training, commenting on men who have "a strong arm and a hard heart to punish, but no temper and no head to instruct" and suggesting "Be to his virtues ever kind. Be to his faults a little blind." Stephen Hammond, a writer for Forest and Stream magazine, advocated in his 1882 book Practical Training that hunting dogs be praised and rewarded with meat for doing the correct behavior.
If your dog isn’t giving you an obvious signal that they need to go out (like whining at the door) I suggest teaching them to ring a bell when they need to go outside. Some of the other signs dogs give that they need to go out such as pacing around or circling can be easy to miss if they’re in another room, which is why a noise based signal such as ringing a bell can make things easier.