  Building on previous work, a new search of the SuperWASP archive was carried
out to identify eclipsing binary systems near the short-period limit. 143
candidate objects were detected with orbital periods between 16000 and 20000 s,
of which 97 are new discoveries. Period changes significant at 1 sigma or more
were detected in 74 of these objects, and in 38 the changes were significant at
3 sigma or more. The significant period changes observed followed an
approximately normal distribution with a half-width at half-maximum of ~0.1
s/yr. There was no apparent relationship between period length and magnitude or
direction of period change. Amongst several interesting individual objects
studied, 1SWASP J093010.78+533859.5 is presented as a new doubly eclipsing
quadruple system, consisting of a contact binary with a 19674.575 s period and
an Algol-type binary with a 112799.109 s period, separated by 66.1 AU, being
the sixth known system of this type.
