There are 2 titles associated with this firm.

Williams, Helen Maria. The History of Perourou; or the Bellows Mender, and interesting tale; by Miss Williams; Author of Paul and Virginia; Letters from France, &c. &c. Embellished with a frontispiece. London: Thomas Tegg and Castleman, William Champante and Benjamin Whitrow, Benjamin Crosby and Co., Wilmott and Hill, Howard and Evans, 1803.
Betham, Mary Matilda. A Biographical Dictionary of the Celebrated Women of every Age and Country. By Matilda Betham. London: Benjamin Crosby and Co., Thomas Tegg and Castleman, Edmund Lloyd [24 Harley Street], 1804.