Train Stop

@Amir: Thanks. I'll respond to both of you in my response to Richard.

@Richard_Irwin: This is an interesting comment. Thank you. This interpretation hadn't occurred to me, and in fact, I'd say I had in mind something like its "compliment" when I saw it on my computer screen. I processed the image for the lighter areas and was so entirely focused on these minor notes that the tone of the larger image escaped me. One of the best things about posting images here are the comments that help you see them in different ways.