Jinnah left London for India in 1896. He decided to go to Bombay after a brief stay in Karachi. He opted for Bombay because it offered scope for the exercise of his legal faculties and ground for his political ambitions. Bombay had the brightest constellation of India's lawyer-politicians, at that time. Ranade, Badruddin Tyabji, Gandhi, Tilak, Gokhale, Cowasji, Dadabhoy Naoroji, Bholabhai Desai, Wacha, Nariman and many more renowned men were based in Bombay.
He was enrolled as a barrister in Bombays' high court on August 24, 1896. He took up lodgings in Room No.110 of Apollo Hotel. Father's business had suffered serious losses by then, and he could hardly get any brief for a year or so but he never stopped helping the poor and needy, even in his precarious financial position. In a letter to the Times of India, Bombay, the June 10, 1910 issue, he appealed to the well-off section of the Muslim Community in Bombay to aid a Muslim orphanage in the city. He donated a handsome amount to the orphanage at a time when his practice was not even flourishing. By 1900, he was introduced to Bombay's acting advocate-general, John Molesworth McPherson, and was invited to work with him in his office. But soon he succeeded in crossing all the hurdles to become a leading lawyer of India. He won many famous cases through powerful advocacy and legal logic.
In politics, he admired Dadabhai Naoroji and another brilliant Parsi leader Sir Pherozeshah Mehta. It was Pherozeshah Mehta, who entrusted him to defend him in the famous Caucus Case. Jinnah hit the headlines in this case; it was remarkable how a 62-year-old statesman of the Congress and an eminent lawyer had entrusted his defence to a young Muslim barrister.
Jinnah appeared in the annual session of the All India Congress, Calcutta, 1906. Dadabhai Naoroji presided over the session with Jinnah serving as his secretary. In his speech Dadabhai called the partition of Bengal a bad blunder for England and addressed the growing distance between the Hindus and the Muslims in the aftermath of partition. He called for a thorough political union among the Indian people of all creeds and classes. To him, the thorough union, therefore, of all the person for their emancipation was an absolute necessity. He viewed that they must sink or swim together. He told them that all efforts would go in vain without union.1
Jinnah reiterated this call for national unity at every political meeting he attended in those years, and he emerged as true Ambassador of Hindu-Muslim unity. He met India's poetess Sarojini Naidu at that Calcutta annual session of Congress, who was instantly captivated by the stunning appearance and rare temperament of India's rising lawyer and upcoming politician.