According to Harriet Robinson, what was the most surprising thing to the public about the strike?

One of the first strikes of cotton-factory operatives that ever took place in this country was that in Lowell, in October, 1836. When it was announced that the wages were to be cut down, great indignation was felt, and it was decided to strike, en masse. This was done. The mills were shut down, and the girls went in procession from their several corporations to the "grove" on Chapel Hill, and listened to "incendiary" speeches from early labor reformers.

One of the girls stood on a pump, and gave vent to the feelings of her companions in a neat speech, declaring that it was their duty to resist all attempts at cutting down the wages. This was the first time a woman had spoken in public in Lowell, and the event caused surprise and consternation among her audience.

Cutting down the wages was not their only grievance, nor the only cause of this strike. Hitherto the corporations had paid twenty-five cents a week towards the board of each operative, and now it was their purpose to have the girls pay the sum; and this, in addition to the cut in the wages, would make a difference of at least one dollar a week. It was estimated that as many as twelve or fifteen hundred girls turned out, and walked in procession through the streets. They had neither flags nor music, but sang songs, a favorite (but rather inappropriate) one being a parody on "I won’t be a nun."