She first appeared at People's Light in 1981 in Shaw's Augustus Does His Bit and became an active company member in 1989, acting, teaching, and directing.
DeLaurier has been associated with the company since 1981 as an actor and director. Despite his wife's death, he appeared in the current production of A Winter's Tale on Tuesday and Wednesday.
Bradley said it was "the best tribute to Ceal" for her husband to embrace the stage, to which they had devoted their lives.
"She would have wanted that," DeLaurier said between shows Wednesday. "She would have been [annoyed] if I had missed it."
He performed in the morning performance Tuesday, then returned to his wife's bedside. They had agreed that he would play the cello for her in her last hours, and he knew this was the time.
As Ms. Phelan listened and briefly hummed with the somber tones, a tear ran down her cheek and she quietly stopped breathing, he said.
DeLaurier returned to the theater and spoke with the cast. All agreed it was right that he appear. "They weren't delicate," he said. "This is a hard production we're in and you've got to hit it hard."
Ms. Phelan was born in Royal Oak, Mich., to William Phelan, an Army colonel, and his wife, Elizabeth, an actress. Later, with Delaware Theater Company, mother and daughter played Amanda and Laura in Tennessee Williams' The Glass Menagerie.
"I didn't train to be an actress," Ms. Phelan once said. "I didn't train to do anything, really, until I got to [the University of Michigan] and finally took my first acting class."
She was bitten for sure, but it was not Broadway glamour that drew her in. Rather, it was the world of regional theater, the community it created and the opportunities it provided.
"When you have an ensemble, you really get to know everyone," she told Stage magazine in 2010 after receiving a Barrymore Award nomination for her performance in David Hare's The Breath of Life at Lantern Theatre Company.
"There's no ice-breaking at the beginning of each rehearsal. You understand how the other person works. Sometimes you become a family, with some of those family problems. But all in all, there's a loyalty, possibly a love, for each other, and certainly very often a respect that makes you mesh together."
In addition to People's Light, Ms. Phelan appeared with the Lantern, the Arden Theatre, Act II Playhouse, and others, and taught and directed at Temple, Arcadia, and West Chester Universities and the University of Delaware.
She was not loath to discuss the impact of her long illness on her work.
"I think just overall I'm a little easier with my approach to acting because it doesn't have the same degree of being crucial," she said in 2010. "It's not as life-and-death as my real situation. And I'm a little more relaxed about acting. . . . I don't tense up as much."
Bradley said Ms. Phelan displayed "enormous courage" throughout her illness and worked continuously.
"I think she treasured the chance to work and do theater and teach. That's what she dedicated her last 10 years to."
In addition to her husband, she is survived by a son, Jake DeLaurier; a daughter, Natalie "Nok" Phrompeng; a sister, and two brothers.
A memorial service is being planned at the Willistown Friends Meeting. A public memorial at People's Light is also in the planning stages.
Contact Stephan Salisbury at 215-854-5594, firstname.lastname@example.org, or @SPSalisbury on Twitter