Click on photo to make it bigger.
I recognized the man kneeling at the very right because of his kinky hair. That is Luther Murkins Winsor, (who is A.P. Winsor Senior's grandson.) This would be a year or two before he married Beatrice Snow. (Wayne always said his brother Brian inherited that hair.)
According the newspaper articles I posted Saturday, this photo was probably taken at A.P. Winsor Sr.'s 95th birthday party in 1913.
(Of course it would have had to be taken before A.P. Winsor Sr's death date of 1917.)