Very nice, bottom right my favorite. Although it is a good shot and it is a nice B&W...I do not like it in the mix here. I think it throughs the balance of the set off. Choose another in color and do a set in all B&W.
But show them separately. Each picture is good and deserves to be appreciated without the distraction of the picture next to it. And each picture is quite small.
It's neat how you can group them together, but there are disadvantages.