Help with Chinese characters in signature
George Ah Kin (https://gwulo.com/node/41881) is my great great great grandfather. I found his Chinese signature in Barbara Moore's book (p.36) in "Eurasian roots: A story of the life and times of George Ah Kin and Mary Higgins and their descendants.
Can anyone make out the last Chinese character of George Ah Kin's signature please? Thank you for any help in advance.
The first 3 characters are: 佐治亞.
George = 佐治; Ah = 亞; the last character is important because that would presumably be "Kin", probably translated phonetically when he immigrated to NSW.