It is quite heavy and they put it on a table, and soon discover that it contains a foundling.
In the foundling home, many nursing infants died of childbed fever.
British Dictionary definitions for foundling
foundling
/ˈfaʊndlɪŋ/
noun
1.
an abandoned infant whose parents are not known
Word Origin
C13: foundeling; see find
Word Origin and History for foundling
n.
"deserted infant," c.1300, from Middle English founden "found," past participle of finden (see find (v.)) + diminutive suffix -ling. Cf. Dutch vondeling, German Findling.