Born in 1669, Spencer Cowper was scarcely of age when he was called to the bar, and made Comptroller of the Bridge House Estate. The office, which was in the gift of the corporation of London, provided him with a good income, together with a residence in the Bridge House, St. Olave's, Southwark, and brought him in contact with men who were able to bring him briefs or recommend him to attorneys. For several years the boy-barrister was thought a singularly lucky fellow. His hospitable house was brightened by a young and lovely wife (Pennington, the daughter of John Goodeve), and he was so much respected in his locality that he was made a justice of the peace. In his profession he was equally fortunate: his voice was often heard at Westminster and on the Home Circuit, the same circuit where his brother William practised and his family interest lay. He found many clients.

Envy is the shadow of success; and the Cowpers were watched by men who longed to ruin them. From the day when they armed and rode forth to welcome the Prince of Orange, the lads had been notably fortunate. Notwithstanding his reputation for immorality William Cowper had sprung into lucrative practice, and in 1695 was returned to Parliament as representative for Hartford, the other seat for the borough being filled by his father, Sir William Cowper.

In spite of their comeliness and complaisant manners, the lightness of their wit and the prestige of their success, Hertford heard murmurs that the young Cowpers were too lucky by half, and that the Cowper interest was dangerously powerful in the borough. It was averred that the Cowpers were making unfair capital out of liberal professions: and when the Hertford Whigs sent the father and son to the House of Commons, the vanquished party cursed in a breath the Dutch usurper and his obsequious followers.

It was resolved to damage the Cowpers:—by fair means or foul, to render them odious in their native town.

Ere long the malcontents found a good cry.

Scarcely less odious to the Hertford Tories than the Cowpers themselves was an influential Quaker of the town, named Stout, who actively supported the Cowper interest. A man of wealth and good repute, this follower of George Fox exerted himself enthusiastically in the election contest of 1695: and in acknowledgment of his services the Cowpers honored him with their personal friendship. Sir William Cowper asked him to dine at Hertford Castle—the baronet's country residence; Sir William's sons made calls on his wife and daughter. Of course these attentions from Cowpers to 'the Shaker' were offensive to the Tory magnates of the place: and they vented their indignation in whispers, that the young men never entered Stout's house without kissing his pretty daughter.

While these rumors were still young, Mr. Stout died leaving considerable property to his widow, and to his only child—the beauteous Sarah; and after his death the intercourse between the two families became yet more close and cordial. The lawyers advised the two ladies about the management of their property: and the baronet gave them invitations to his London House in Hatton Garden, as well as to Hertford Castle. The friendship had disastrous consequences. Both the brothers were very fascinating men—men, moreover, who not only excelled in the art of pleasing, but who also habitually exercised it. From custom, inclination, policy, they were very kind to the mother and daughter; probably paying the latter many compliments which they would never have uttered had they been single men. Coming from an unmarried man the speech is often significant of love, which on the lips of a husband is but the language of courtesy. But, unfortunately, Miss ('Mistress' is her style in the report of a famous trial) Sarah Stout fell madly in love with Spencer Cowper notwithstanding the impossibility of marriage.

Not only did she conceive a dangerous fondness for him, but she openly expressed it—by speech and letters. She visited him in the Temple, and persecuted him with her embarrassing devotion whenever he came to Hertford. It was a trying position for a young man not thirty years of age, with a wife to whom he was devotedly attached, and a family whose political influence in his native town might be hurt by publication of the girl's folly. Taking his elder brother into his confidence, he asked what course he ought to pursue. To withdraw totally and abruptly from the two ladies, would be cruel to the daughter, insulting to the mother; moreover, it would give rise to unpleasant suspicions and prejudicial gossip in the borough. It was decided that Spencer must repress the girl's advances—must see her loss frequently—and, by a reserved and frigid manner, must compel her to assume an appearance of womanly discretion. But the plan failed.

At the opening of the year 1699 she invited him to take up his quarters in her mother's house, when he came to Hertford at the next Spring Assizes. This invitation he declined, saying that he had arranged to take his brother's customary lodgings in the house of Mr. Barefoot, in the Market Place, but with manly consideration he promised to call upon her. "I am glad," Sarah wrote to him on March 5, 1699, "you have not quite forgot there is such a person as I in being: but I am willing to shut my eyes and not see anything that looks like unkindness in you, and rather content myself with what excuses you are pleased to make, than be inquisitive into what I must not know: I am sure the winter has been too unpleasant for me to desire the continuance of it: and I wish you were to endure the sharpness of it but for one short hour, as I have done for many long nights and days, and then I believe it would move that rocky heart of yours that can be so thoughtless of me as you are."

On Monday, March 13, following the date of the words just quoted, Spencer Cowper rode into Hertford, alighted at Mrs. Stout's house, and dined with the ladies. Having left the house after dinner, in order that he might attend to some business, he returned in the evening and supped with the two women. Supper over, Mrs. Stout retired for the night, leaving her daughter and the young barrister together. No sooner had the mother left the room, than a distressing scene ensued.