[2] In 1881, he immigrated to the United States, initially settling in Baltimore before moving to Philadelphia, where he worked as a tutor for aspiring college students.

[6] In a poem about Garside, de Cleyre wrote lovingly of his "tender mouth and Christ-like eyes", as well as his voice, which she described as "sweet as the summer wind that sighs through the arbors of Paradise.

"[7] Despite warnings from Dyer Lum, who told her that Garside was "vain and self-indulgent", de Cleyre fell deeply in love with him.

[10] In January 1889, Garside attended a Knights of Labor meeting in Chicago, where he was scheduled to give a lecture on behalf of the SLP.

[17] In 1889, Garside moved to New York City, where he joined the International Working People's Association (IWPA), spoke alongside Johann Most at its meetings and published a pamphlet that critiqued modern industrialisation, which sold 15,000 copies.

[18] By this time, Garside had become concerned with improving living and working conditions for the city's Jewish immigrants, organising mutual aid societies for their benefit.

"[18] An article about the strike in The Midland Journal described him as "a man who impresses one with the idea that his store of nervous energy must be almost inexhaustible, and his frank manner and pleasant voice bind to him the confidence of his followers, and enable him to sway the passions of those toilers who have learned to believe him almost infallible.

"[1] Chaim Leib Weinberg recalled Garside leading a parade on International Workers' Day of 1890, which was so large that the press began to panic, "terrified that social revolution in America was imminent".

[24] Garside secured strike pay for the cloakmakers, and gained the support from Jewish anarchists after he spoke in favour of "propaganda of the deed" and against electoralism.

[30] By 1893, Garside had returned to Britain and settled in Broughton, where he joined the Independent Labour Party (ILP) and became involved in tenants rights struggles.

He wrote about the exploitation of tenant-workers in Ancoats by the Manchester Corporation, and was involved in a litigation case against landlords by the Lancashire and Cheshire Society of Stallholders.