Photographs for history book

I'm doing a beta read for a history of Canada's Parliament buildings. The author knows his stuff, having worked on repairs and restorations of said buildings his entire career.

While his manuscript is entertaining and well laid out, he has imbedded photographs in it throughout to illustrate things. Pictures of the aftermath of an historically significant fire, a look at the texturing for the stone that was chosen for the exterior, things like that.

Now he's a first-time author, and I know nothing about what non-fiction publishers want. My first instinct says retype the manuscript without the pictures but mention that you have them available. He's probably got a fair chance of attracting a publisher and I don't want to mislead him, so I thought I'd check with the experts before saying anything.

ETA: The manuscript is formatted as if it were the finished book, with pictures or placeholders on almost every page. The pictures are great, permissions or sources cited, but should they be included with the manuscript or query?

Thanks for the responses. I don't know if he's realized he has to get and possibly pay for images. My thinking was also that a publisher might want to group them together so not every page has to be the more expensive gloss paper.

Appreciate your time, always.

The majority of the photographs are from Library and Archives Canada. Given that, he probably won't have too many problems with permission. Quite a few are his own (and look very professional, too.)

I'm so glad I came here to ask questions.

I'll pass all of that along to him when I finish reading, this weekend, hopefully.

Thank you again.

Okay, I'll pass that along to him as well and let him decide what he wants to do. I know nothing about the publishers or market for this type of tome. I'll make sure I tell him to check the guidelines for each publisher.

Thanks!