Am feeling charitable and thus did some research. Ride the wave....
Building on corner of Front and Whitehall 49 Whitehall Street was the Jacob Houseman House
https://www.loc.gov/resource/hhh.ny0...tos?st=gallery
https://www.loc.gov/resource/hhh.ny0548.photos/?sp=2
Like all great people Jacob Houseman was from Staten Island:
IK Bio of Jacob Housman
#47 Whitehall Street is the Jacob Crocheron House
https://picryl.com/media/jacob-croch...rk-county-ny-5
https://commons.wikimedia.org/wiki/F...NEYO,126-1.tif
https://ny.eater.com/2012/5/24/65848...s-in-the-1960s
Late Night Cafe: New York in the 40s - 3
These and other buildings down there most certainly are or were pre-Civil War if not dating to early years of Manhattan, hence their inclusion in Library of Congress and other historical archives.
Buildings you mentioned and have given information on were demolished to make way for #3 New York Plaza. You can see what much of that part of Manhattan looked like back in the day here:
CHARLES CUSHMAN'S 1940s NYC COLOR VIEWS - Forgotten New York
As to the how and why of the destruction two words "urban renewal".
By the l950's spurred by federal and other funding and in a race to reverse "declining" urban areas, New York City joined many others in declaring vast areas "blighted" and took (or attempted) via eminent domain for redevelopment. Looking as some of the pictures above you can see how some might get the idea Whitehall/Front Street area was in need of "improvement".
In 1959 NYC hatched out a plot called the "Battery Park Urban Renewal Plan". As name suggested this gave us what is BPC today and much of the changes down there in from the 1960's through well into the 1970's or so. This includes IIRC the taking of the land which became the World Trade Center.
City sought to make a land grab further east to get the land under what is now 1 and 2 New York Plaza and 115 Broad Street. Owner of land fought back and won right to keep properties but had to develop them, the rest as they say is history.