Historian Keith Lockhart has combed through dozens of photos, postcards and photo-based illustrations from days long gone by in Delaware County, and there’s no end in sight. He’s cataloging them, and that’s where your help comes in.

This week’s photo is of Main Street in Colwyn. Any idea what block, the house numbers and the cross streets?

Think you know something? Keith’s email is keith106@rcn.com. Check out more from Keith at delawarecountyhistory.com.

Here’s what you had to say about last week’s photo from Clifton Heights:

• “The view is looking west on E. Broadway Ave. towards S. Springfield Ave. in Clifton Heights. This is the intersection of E. Broadway and S. Penn St. The address of the home in the foreground on the right is 77 E. Broadway Ave.” — Dennis & Jack McKnight

• “Today’s photo looks like it was taken from just east of Broadway and Penn St., facing west. The house on the right matches well with the current home at 77 East Broadway. The house on the left looks a bit different than the current home at that location, but it appears to be in the same footprint on that lot. The 2nd home on the left side is also a very good match for the twin homes currently at 48 and 46 East Broadway.” — Greg Shaffer

• “The photo shows you standing on Broadway Ave looking south down Broadway Ave towards Springfield Road intersection. The cross street in front of you is Penn Street. The first house on your right side after you cross over Penn is 77 Broadway Ave. House after that is twin- 65 and 67 Broadway Ave. Large first house on your left- is still there on corner, address is probably 50 or 52.Next house after this on your left is twin, 46 and 48. Almost all of these houses are still there. … Thanks for posting these old pics, I love them!” — Debbie Buckley

• “This picture is looking west on E. Broadway Avenue in Clifton Heights at the intersection of Ogden Street. The person taking the picture is standing approximately at 109 E. Broadway Ave.” — Kevin and Tommy Ostien

Though one disagreement on the cross street, this mystery is pretty well solved.