Re: Herbert Lees
Your post was pretty vague as to details on Herbert, such as wife and kids.Items like these help us volunteers as we search and locate individuals with the same name (and sometimes in the same locations) and allow us to conclude IF someone may be the person you seek.
What I do find on the LDS pilot record site is a death for a Herbert Wesley Lee,who died in 1937 and is buried in Oak Hill Cemetery in Chicago.Info shows parents were Thomas James Lee & Louise Conlin.Spouse was Lillian.This Herbert was born in MI in 1897.Without knowing anything more on yours, I have no idea if this fellow could be the one you seek.
Oh, this fellow too shows his occupation was a meat cutter.
1920 census shows me 3 results for this name in Cook County/Chicago:
One b. 1911
One, Herbert F Leesb. 1889 England and resided in Chicago wd 29, spouse Ethel A and children Mary E & Eleonore B
lastly, Herbert H Lees, b. 1875IL, resided in Proviso Township, village of Maywood,spouse Anna H, children Mary L and Marjorie V.
images are not available for this census at LDS, however you can view them at ancestry.com (which I have no access to).
Lastly, you could always contact Oak Park Cemetery and see if he is buried there.If not, I wouldn't hesitate to make a few calls or write up a few emails to other Chicago cemeteries in an attempt to locate him.
Cemetery records should show a date for burial and possibly a funeral home.If the funeral home is still viable, contact them for more info if you cannot locate a dc for him in IL or a place of death (if he died out of state then that's where the dc would be filed for him).
There are also databases (maybe some at ancestry.com) that carry older Chicago newspapers.These could be checked out for his obit, many of those databases are searchable by name....
If you don't have access to ancestry.com, check with your local library.Many libraries now carry access to various genealogical subscription websites as a benefit for their community.Would seem to me that someone dying in a plane crash would have had some type of mention in the local newspapers...