WINSLOW (G ) "In the midst of the assembly will I sing praise to thee." (Cranleigh, G.Winslow,[n.d.] p. 5". (KR10425) 11498
The 'Cranleigh' reference actually enables his identification. Appears to have been an 'Oil Merchant; - maybe that explains visit to Canada and Niagara.
His uncle, Octavious Winslow; https://en.wikipedia.org/wiki/Octavius_Winslow was a well known Baptist preacher.