Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1891 Thomas married an heiress to a small fortune , which gave him the finances to hire mammal collectors and present their specimens to the museum .
Simplified: In 1891 Thomas married a woman who was an heiress to a large amount of money . Having this money allowed him to hire mammal collectors and to give their specimens to the museum .