The characters in the following transcriptions are given at their original positions in the images. Please be aware of the directionality when reading these characters, which is generally from top to bottom, right to left.
庭植, artist's self-styled pseudonym.
Artist's real name. Three characters only:
- Right hand character is 「呉」 re-interpreted into a (non-standard?) seal script shape.「呉」is a variant of「吳」.
- Top left is 「東」.
Bottom left is too hard to see, although the two seals are probably identical to
in which case the character is 「槐」.
Thanks to @水巷孑蠻 who found these seals here, which record the name of a Qing Dynasty artist 吳東槐.
水青三冠徑
中𠀘山成㬜（𠀘＝天，㬜＝晉）
分外半古代
白二落丠衣（丠＝丘）
Note that I would consider this a non-standard way of writing「白」(bottom left-hand corner). This is equivalent to writing「自」and omitting one of the horizontal lines, but「白」and「自」are from completely different glyph origins.
Calligrapher:
伊
索
涭
(uncertain; corrections welcome)
This is part of the Tang Dynasty poem by Li Bai, given below:
唐・李白《登金陵鳳凰臺》
鳳凰臺上鳳凰遊，
鳳去臺空江自流。
吳宮花草埋幽徑，
晉代衣冠成古丘。
三山半落青天外，
二水中分白鷺洲。
總爲浮雲能蔽日，
長安不見使人愁。
wasn't correct for seal script. That「山」is modified from an oracle bone or bronze inscription shape.