西方的躺姿。上图出自贝克式步枪设计者Ezekiel Baker于1804年出版的射击指南
《Twenty-three Years Practice and Observations with Rifle Guns》。
下图为1875年一张描述射击比赛的插画，其中美国US Long Range Rifle Team
以躺姿射击。
https://i.imgur.com/IbiqVkR.jpg
1873年报刊《Punch》的插画〈Skirmishing in perspective〉，
图说大致为：“如果该处没有掩体，一名优秀的散兵会躲在他的靴子后面！”
https://i.imgur.com/3reISYq.jpg
从马偕牧师和约翰·汤姆生的老照片来看，十九世纪台湾原住民使用的火绳枪，
有些长度和成年男子差不多高。英国皇家兵械库收藏了一只台湾火绳枪，网站
提供细部照片与Ｘ光照片，这把枪的全长为165.5公分。
https://i.imgur.com/pskYHmG.jpg
https://i.imgur.com/FXikh9y.jpg
参考：
David Minshall〈The Back Position〉
http://bit.ly/2lnzJ3q
Twenty-three Years Practice and Observations with Rifle Guns
https://archive.org/details/twentythreeyear00bakegoog/page/n33
The crack shots
http://www.loc.gov/pictures/item/91722896/
Punch, or the London Charivari
https://archive.org/details/punch64a65lemouoft/page/110
From far Formosa. The island, its people and missions
https://archive.org/details/fromfarformosais00mack/page/n267
Native hunters, Formosa by John Thomson
https://wellcomecollection.org/works/tyqm82tt
Matchlock musket (niao qiang) (1800-1899)
https://collections.royalarmouries.org/object/rac-object-56442.html