A correction to the 41-structure of the Monster, a construction of a new maximal subgroup L2(41) and a new Moonshine phenomenon

We correct the result of a previous paper which purported to show that L2(41) was not a subgroup of . Our main result is that there is exactly one conjugacy class of subgroups L2(41) in the Monster, such subgroups being self-normalizing and maximal. This leads to a new unexplained Moonshine phenomenon.