[4] Elger studied at University College London and adopted the profession of a civil engineer.
He had developed a strong taste for astronomy already at an early age and erected his first observatory in Bedford.
[2][3] He is most remembered for his book The Moon: A full Description and Map of its Principal Physical Features.
Published in 1895, its maps are still highly regarded by lunar observers due to their uncluttered nature.
[5] Besides his astronomical work, he was an ardent archaeologist and founded the Bedfordshire Natural History Society and Field Club.