Natatoria are often programmed as part of Rec centers. Like gymnasiums, natatoria may be of many different sizes, but they require large clear-span structures. In addition, swimming pools have specific requirements for soil conditions and foundation systems, as well as spatial relationships with equipment rooms and locker rooms. […] These unique features make it very unlikely that an existing building can be transformed into a natatorium for less cost than building new. If the other desired program elements can be adequately developed within existing space, the natatorium piece might be a sensible addition or future phase.

7 April 1900, Jack London, “The Son of the Wolf”, in The Son of the Wolf: Tales of the Far North, Boston, Mass.; New York, N.Y.: Houghton, Mifflin and Company[…], OCLC 1161196780, page 24:

We recommended increasing the pay of one swordmaster to $1,800; and of assistants, one at $1,600 instead of $1,500, and one at $1,400 instead of $1,300, and so on.

for the Chinese virus to find its way into the ducks of the Red River delta or Mekong Delta or the central plains of Thailand, it helps a lot if, in between those places, you have lots of hugely susceptible chickens.