Maulvi Barakatullah (1854-1927) was an Indian Muslim revolutionary who campaigned for the independence of India from several countries outside India. Bhopal University in India was re-named after him as Barkatullah University. He spent the last few months of his life in the USA, died in San Francisco and was buried in Sacramento. See Wikipedia article on his life.
In the Lahore Ahmadiyya English magazine The Light a letter was published in the issue for 8 December 1927 in this connection written by a member of the Lahore Ahmadiyya Movement from San Francisco who looked after Maulvi Barakatullah in his dying days. I have made it available at this link.
The writer of the letter is Mirza Daud Baig. He was the older son of Dr Mirza Yaqub Baig, the well-known prominent follower of Hazrat Mirza Ghulam Ahmad, and a founding member of the Lahore Ahmadiyya Anjuman. Mirza Daud Baig returned to India a couple of years later, and spent most of the last years of his life in Turkey, having married a Turkish woman while still in India. (He was also wife's maternal uncle, so we personally know some details of his life.)