"The iron-cased rockets of Mysore alarmed the British. That this was something new that they were encountering becomes evident in the British chronicles, like those of Innes Munro who gives an account of how these rockets operated: Hyder Ally also employs some thousands of men for throwing rockets. This is a missive weapon, and made in the same form as those used by schoolboys, with this difference, that the stalk is a thick bamboo, eight or ten feet long, which has a tube of iron, from six to twelve pounds weight, fixed to the end of it, in which the fuse and powder are placed. In wet weather, or marshy grounds, these are set off flying in the air, and will reach to the distance of a mile and a half; but upon dry grounds they are pointed horizontally, and bound in a very uncertain direction, often creating great damage, particularly amongst cavalry and ammunition tumbrils. Hyder’s train of artillery is chiefly composed of French and Danish guns of different calibers, but most commonly heavy metal, which are doubly yoked with trained bullocks; and are as well and expeditiously served as ours."
January 1, 1970
https://en.wikiquote.org/wiki/Mysorean_rockets