But he was not always alone, because years afterwards he became a man and married."In the Rukh" is certainly written from a different standpoint. In the Jungle Books we are inside Kipling's created world of the Jungle people. In "In the Rukh" we see the jungle, the 'Rukh', through the eyes of Gisborne, the British Forest Officer, from the outside. Not surprisingly, therefore, Kipling seems to have been undecided about adding it to the Mowgli canon. He did include it in the (American) Outward Bound Edition of The Jungle Book (1897) which contained all the Mowgli stories, with the others placed in The Second Jungle Book of that edition. It was included in a number of other Jungle Book editions, including All the Mowgli Stories (Macmillan, 1933). But in the Sussex Edition, which can be seen as reflecting Kipling's final judgement on the ordering of his works, it is included in Many Inventions.
But that is a story for grown-ups.