▁▁ ▁In ▁his ▁final ▁years ▁at ▁Cambridge , ▁Green ▁became ▁rather ▁ill , ▁and ▁in ▁ 1 8 4 0 ▁he ▁returned ▁to ▁S ne inton , ▁only ▁to ▁die ▁a ▁year ▁later . ▁There ▁are ▁rum ours ▁that ▁at ▁Cambridge , ▁Green ▁had ▁" su cc um bed ▁to ▁alco hol ", ▁and ▁some ▁of ▁his ▁earlier ▁supp or ters , ▁such ▁as ▁Sir ▁Edward ▁B rom head , ▁tried ▁to ▁distance ▁themselves ▁from ▁him . ▁▁ ▁Green ' s ▁work ▁was ▁not ▁well ▁known ▁in ▁the ▁mathematical ▁community ▁during ▁his ▁lifetime . ▁Besides ▁Green ▁himself , ▁the ▁first ▁math ematic ian ▁to ▁quote ▁his ▁ 1 8 2 8 ▁work ▁was ▁the ▁Brit on ▁Robert ▁Mur phy ▁( 1 8 0 6 – 1 8 4 3 ) ▁in ▁his ▁ 1 8 3 3 ▁work . ▁In ▁ 1 8 4 5 , ▁four ▁years ▁after ▁Green ' s ▁death , ▁Green ' s ▁work ▁was ▁redis cover ed ▁by ▁the ▁young ▁William ▁Thom son ▁( then ▁aged ▁ 2 1 ), ▁later ▁known ▁as ▁Lord ▁Kel vin , ▁who ▁popular ised ▁it ▁for ▁future ▁mathemat icians . ▁According ▁to ▁the ▁book ▁" Ge orge ▁Green " ▁by ▁D . M . ▁C ann ell , ▁William ▁Thom son ▁noticed ▁Mur phy ' s ▁c itation ▁of ▁Green ' s ▁ 1 8 2 8 ▁ess ay ▁but ▁found ▁it ▁difficult ▁to ▁locate ▁Green ' s ▁ 1 8 2 8 ▁work ; ▁he ▁finally ▁got ▁some ▁copies ▁of ▁Green