user45064: Something comparable -- though not necessarily as comprehensive -- to the datasets found here: http://api.bitcoincharts.com/v1/csv/
These links are all dead:
Is there a source for historical LTC trades available?
This site apparently had full trade data history: http://ltc.block-explorer.com/charts
...But that's dead as well.
help greatly appreciated!

user49924: A bit late, but better late than never.
No guarantee given for accuracy. 
From day one to January 8 2016
For the first 262 days the average trading price is used as no closing price available.
Bitcoin price mainly from Bitstamp, Litecoin from BTCe so LTC-BTC is a bit different for BTCe price
No trade first couple of days ltc-dollar price established from ltc-btc and bitcoin dollar
The lowest closing price was on May 29 2012 at $0.0023.
The lowest recorded deal January 23 2012 at  1:36:42   $ 0.001302   4.20697  Litecoins changed hands at that price (did have all volume too, but gone. was just a spreadsheet, but link to it dead too)
Three days did not have any trades at all: 17.March 2012, 6.May 2012, 17.May 2012
LTC-USD
LTC-BTC

45064: <p>Something comparable -- though not necessarily as comprehensive -- to the datasets found here: <a href="http://api.bitcoincharts.com/v1/csv/" rel="nofollow noreferrer">http://api.bitcoincharts.com/v1/csv/</a></p>

<p>These links are all dead:
<a href="https://bitcoin.stackexchange.com/questions/35706/is-there-a-source-for-historical-ltc-trades-available/36348">Is there a source for historical LTC trades available?</a></p>

<p>This site apparently had full trade data history: <a href="http://ltc.block-explorer.com/charts" rel="nofollow noreferrer">http://ltc.block-explorer.com/charts</a></p>

<p>...But that's dead as well.</p>

<p>help greatly appreciated!</p>
 49924: <p>A bit late, but better late than never.</p>

<p>No guarantee given for accuracy. 
From day one to January 8 2016
For the first 262 days the average trading price is used as no closing price available.</p>

<p>Bitcoin price mainly from Bitstamp, Litecoin from BTCe so LTC-BTC is a bit different for BTCe price</p>

<p>No trade first couple of days ltc-dollar price established from ltc-btc and bitcoin dollar
The lowest closing price was on May 29 2012 at $0.0023.
The lowest recorded deal January 23 2012 at  1:36:42   $ 0.001302   4.20697  Litecoins changed hands at that price (did have all volume too, but gone. was just a spreadsheet, but link to it dead too)
Three days did not have any trades at all: 17.March 2012, 6.May 2012, 17.May 2012</p>

<p><a href="https://pastebin.com/raw/k2vG2XMf" rel="nofollow noreferrer">LTC-USD</a></p>

<p><a href="https://pastebin.com/raw/uBpjNBvc" rel="nofollow noreferrer">LTC-BTC</a></p>
