The phrase "already by the end of" is correct and usable in written English.
It can be used to indicate that something has occurred or been achieved before the conclusion of a specific time period.
Example: "The project was completed already by the end of the month, exceeding our expectations."
Alternatives: "by the conclusion of" or "before the end of".
Already by the end of the summer Corrie had shown a few visitors around.
Already by the end of the 13th century, a style of architecture was evolving that ultimately developed into the true English equivalent of Rayonnant, generally known as Perpendicular.
Already, by the end of July it had cut short-term interest rates six times in a bid to stave off a full-blown recession in the world's largest economy.
The civil war lasted two more years, but already by the end of 1973 the Lon Nol government controlled only Phnom Penh, the northwest, and a handful of provincial towns.
Already by the end of the first week, they're no longer getting that quality.
Long term effects of fishing are also in accordance with the evidence that, already by the end of the 19th century, fishery was considered responsible for stock depletion [32] and, few decades later, fishery was proved to be responsible for the structural changes in fish communities in the area [25].
The shellfish-eating hybodont sharks, already diversified by the end of the Permian, continued into the Triassic.
Prime Minister's Questions was less of a yah-boo brawl for a while, although it was already lapsing by the end of the term.
One church (though not its building) dates from the 1200's; the present town plan was already established by the end of the 17th century.
As for Mr. Comey, many of the policy disputes in the years after the attacks of Sept. 11, 2001, had already faded by the end of Mr. Bush's second term.
The translation of the Pentateuch from Hebrew into Greek was a practical necessity for the large Jewish community in Alexandria, already Hellenized by the end of the 3rd century bce.
