I hope you’ll join me tonight on “The Lost Chord,” as we round out our trilogy of programs featuring rarely-heard recordings of American music by Eugene Ormandy and the Philadelphia Orchestra.

We’ll hear two songs (originally from a collection of five), after texts of William Blake, by Virgil Thomson; Roy Harris’ underrated Symphony No. 7, in a powerhouse performance; and Louis Gesensway’s “Four Squares of Philadelphia.”

Gesensway was born in Latvia in 1906. A violin prodigy, he was one of the founders of the Toronto Symphony Orchestra. He came to Philadelphia at the age of 19, where he played in the orchestra under Stokowski and Ormandy.

In his mid-20s, he took a leave of absence to study composition with Zoltán Kodály. “Four Squares of Philadelphia” was described by the composer as a “symphonic poem for large orchestra, narrator and street criers.”

The piece opens with a recitation of William Penn’s prayer, then continues with musical evocations of Washington Square (captured in early morning, during Colonial times, with street criers hawking their wares), Rittenhouse Square (on a bright and cheerful afternoon), Logan Square (with its fountains at dusk), and Franklin Square (at night, reflective of noisy bridge traffic, with a side excursion into Chinatown, and interjections from the honky tonk joints located around the square in the 1950s).

I hope you’ll join me for one more trip to the well, with “All-American Ormandy III,” tonight at 10 ET, or that you’ll listen to it (while you’re sitting in traffic, no doubt) when the show repeats Thanksgiving eve at 6. If your family is stressing you out, you can always catch it later as a webcast at wwfm.org.

PHOTO: Statue of Penn high atop the city he founded